The defender is not expected to play again this season despite closing in on a full recovery from a serious hamstring injury.
Amass suffered the injury just days into a loan spell with Norwich.
The full-back, who had an outstanding first half of the season at fellow Championship side Sheffield Wednesday, was recalled by United so he could continue his rehabilitation at the club's Carrington training ground.
Sources say Amass, 19, is training outside again.
However, a return to Norwich for the final four games of the league campaign has been ruled out and while Amass could, in theory, play for United's Under-21 side in the Premier League 2 play-offs, which are due to start next week, that is thought to be unlikely.
The anticipation is he will be available for the start of pre-season training in mid-July.
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Meanwhile, winger Jadon Sancho will have to accept a significant drop in wages if he wants to rejoin Borussia Dortmund when his Manchester United contract expires this summer. (Mirror, external)
Man City v Arsenal: Who do you want to win?published at 07:18 BST
07:18 BST
Image source, Getty Images
Two Premier League heavyweights are set to face each other this weekend at Etihad Stadium, as Manchester City host Arsenal.
Both teams go into the fixture with different targets. For Mikel Arteta's side, it is about extending their lead at the top of the table. For Pep Guardiola's side, it is about closing the gap and keeping themselves in the title race.
It is a fixture being labelled a title decider by some, so we want to know who you want to win this Sunday's match.
Will you be cheering on the Citizens or getting behind the Gunners?
'Make or break' fixtures ahead after 'sickening wake-up call' against Leedspublished at 16:43 BST 14 April
16:43 BST 14 April
Alex Turk Fan writer
Image source, PA Media
Manchester United need their first win of the run-in and fast. The longer this current rut continues, the more doubt surrounds Champions League football next season.
United are very nearly there. Three, or even two, wins from the final six Premier League matches should seal it. But Monday's 2-1 defeat by Leeds United at Old Trafford was a sickening wake-up call.
Leeds had not won a league game in M16 for 45 years. Their only Premier League away win all season was at Wolves. Yet, they played United off the park for the first hour.
Michael Carrick can't use the abnormal 24-day break as an excuse. His players looked like they hadn't played with each other for 24 years. And that is a major concern heading into a critical period.
Chelsea,Brentford and Liverpool are United's next three opponents. They sit sixth, seventh and fifth in the Premier League, all within eight points of the Red Devils. The term "make or break" is suitable here, I think.
A successful period would secure a return to Europe's elite competition. But if more bad results are on the horizon, United can kiss that dream goodbye.
Carrick's side would have had a 10-point lead on sixth-placed Chelsea had they beaten Leeds. That advantage will reduce to four points with another defeat at Stamford Bridge.
He has done a great job to propel United into third and the driver's seat for Champions League qualification. But Carrick is at risk of undoing his joyous return.
Anything but a win at Chelsea would make this current patch of form United's worst of the entire season. That is a worrying turn of momentum that may prove costly, in more ways than one.
There is no other option but to bounce back against Chelsea and compound on Liam Rosenior's recent woes with a timely win. I fear what the remainder of the campaign looks like if they do not.
🎧 'United were woeful!' Leeds loss analysedpublished at 16:43 BST 14 April
16:43 BST 14 April
Listen to a new episode of The Devils' Advocate podcast from BBC Radio Manchester, reflecting on Manchester United's 2-1 loss to Leeds in the Premier League on Monday.
Listen below or on BBC Sounds here - and don't forget to subscribe to get each episode into your My Sounds feed.
Carrick must feel 'concern' as pressure buildspublished at 16:43 BST 14 April
16:43 BST 14 April
Simon Stone Chief football news reporter
Image source, Getty Images
As frustrating as it can be for the media, who benefitted enormously from Ruben Amorim's rent-a-quote period in charge, his calmness and refusal to get flustered has been viewed as one of Michael Carrick's major strengths.
Yet when results do not go well, it can look like inaction.
Should he have made changes earlier? Should he have selected different players to start with? Can he cope with the pressure?
These are all questions that are asked after defeats, even if nothing much has changed from victorious days.
Carrick's Manchester United have to be viewed over a period of time.
It was unfortunate for the head coach that minority owner Sir Jim Ratcliffe was in the directors' box to hear the half-time booing, to witness a tepid opening period, and the failed rescue attempt.
The loss will sting. But not as much as if it is repeated at Stamford Bridge - somewhere Manchester United traditionally struggle for victories, right back to the 1960s, and have won only twice since 2002.
If it is, it will be one win in five and the gap to Chelsea will be down to four points and Champions League qualification will no longer be viewed as certain.
Carrick was bullish as he assessed the situation. Deep down, there must be some concern as well.
"Whatever happened tonight is not going to suddenly change my opinion on what we are as a team," he said.
"It is a big end to the season. We have done a lot of good things so far and the mentality and the character and the boys wanting to do well - I have never doubted that."
Man Utd 1-2 Leeds - the fans' verdictpublished at 12:05 BST 14 April
12:05 BST 14 April
Media caption,
We asked for your thoughts after Monday's Premier League game between Manchester United and Leeds United.
Here are some of your comments:
Manchester United fans
David: Too many times Man Utd start games badly. A stupid sending off. Played well with 10 men and were unlucky not to get a draw. It is a worry that with Casemiro gone, where do midfield goals come from?
Neil: Can't believe how little respect Man Utd showed Leeds and how badly they underestimated a team fighting for their lives. Leeds should have had four in the first half and overpowered Man Utd.
Mark D: Terrible, no tempo to the play, the players start so slow. Surely the coach can see this and allows the opposition to get a foot in the game. Ironically, United started to play with pace when down to 10 men because they had to. Team selection and the use of subs were also baffling.
Steve: Carrick has failed the audition, too slow with changes again and not for the first time! Gone is the energy that started his spell... too slow and too predictable.
Leeds fans
Richard: So proud of every single player in that Leeds team. We battered Man Utd on their home turf, especially in the first half and could have been 3-0 or 4-0 up. We looked like the team third in the league. Massive three points and what a performance. Super Leeds.
Boris: Been a long time coming, and having a couple of dodgy refereeing decisions go our way, for a change, makes victory taste even sweeter. Farke has achieved a feat that Wilkinson, O'Leary and Bielsa never managed. Beating the old enemy on their own ground, and deservedly so.
Joe: Unbelievably proud! Every single one of the boys showed fight, desire and passion for the shirt. We'll remember this victory over our biggest rivals for such a long time. Let's keep ourselves humble, though, beat Wolves on Saturday and I think we'll be pretty much there. We deserve to stay in this league!
Philip: I was there at Old Trafford in 1981 as a 16-year-old as Brian Flynn scored. This is another match that no Leeds United fan will ever forget. We mashed 'em! Could have been five or more. Legends to a man in the white shirts.
Pivotal hours ahead for Man Utd after red card appealspublished at 11:29 BST 14 April
11:29 BST 14 April
Simon Stone Manchester United reporter
Image source, Getty Images
Over the next 48 hours, Manchester United will find out whether Harry Maguire will receive an additional punishment for his red card at Bournemouth last month.
The defender was charged with improper conduct by the Football Association (FA) for something he said to fourth official Matt Donohue as he made his way off the field.
An additional suspension would rule him out of the Chelsea game on Saturday, which Matthijs de Ligt is almost certain to miss as he deals with a long-term back problem.
Lisandro Martinez will also miss out - in addition to home games against Brentford and Liverpool - after he was dismissed for violent conduct for pulling Dominic Calvert-Lewin's hair in the second half of Monday's 2-1 defeat by Leeds United.
Michael Carrick has suggested the club will appeal against the red card. However, if they are not successful, his only available central defenders will be 19-year-old Ayden Heaven and 20-year-old Leny Yoro at Stamford Bridge.
"That's why we have a squad," countered Carrick. "We have got players that we can call upon. We will go there and look forward to the game.
"Hopefully Licha [Lisandro Martinez] is still available. I certainly think he should be after that [red card], but we will see."
Will Man Utd appeal against Martinez's red card?published at 11:28 BST 14 April
11:28 BST 14 April
Dale Johnson Football issues correspondent
Image source, Getty Images
We have been here before this season.
In January, Everton tried to get Michael Keane's dismissal overturned after he had tugged the hair of Wolves' Tolu Arokodare.
The Toffees were not successful and boss David Moyes said he was "angry" with the appeal panel and "embarrassed" for the video assistant referee Chris Kavanagh.
FA disciplinary panels, usually made up of three former players, are notoriously hard to predict. It really can depend upon which ex-players you get on your panel.
Manchester United will have to base their appeal on a lack of force in the action, because they cannot claim Lisandro Martinez did not have Leeds striker Dominic Calvert-Lewin's hair in his grasp.
In Keane's case, it was a 2-1 vote to reject the appeal. The majority view was that it fell "outside the normal constituent elements of a challenge in football".
The other panel member said it was "an action born out of instinct and of minimal force".
However, Manchester United have nothing to lose because extra games for frivolous appeals were effectively ended 15 years ago when the fast-track system came in.
But Calvert-Lewin going down and holding the back of his head would have been key for the VAR review, and that will make it more difficult to win an appeal based on lack of force.
Shades of Ferguson but Carrick needs a responsepublished at 08:11 BST 14 April
08:11 BST 14 April
Simon Stone Manchester United reporter
Image source, Getty Images
Michael Carrick seemed to be taking a chapter out of Sir Alex Ferguson's play book with his ferocious attack on the decisions that went against Manchester United last night.
Ferguson frequently targeted officials and their decisions after disappointing results.
The tactic has two purposes.
Firstly, it serves notice the officials are not going to get an easy time of it and perceived injustices will get called out.
I am sure Carrick genuinely thought Leny Yoro was impeded for the first Leeds goal and Lisandro Martinez was unjustly sent off in the second half.
But, almost of more importance, it deflects attention away from an overall performance, which last night, until Martinez's dismissal bizarrely, was poor from Manchester United.
Leeds were on the front foot from the first whistle, had two glorious chances to score in the first half beyond the two goals they did get, and fully deserved their success.
Carrick played down the impact of the 24-day gap between fixtures, although it would explain why his side were so sluggish.
The big question is how will they respond? They go to Chelsea on Saturday. A rare victory at Stamford Bridge, or even a draw, will keep them on track to claim a Champions League spot. Defeat – with home matches against Brentford and Liverpool to come – will leave Carrick's side in a precarious position.
Gossip: Man Utd keeping an eye on RB Leipzig captain Raumpublished at 08:01 BST 14 April
08:01 BST 14 April
Manchester United and Liverpool are keen on RB Leipzig captain David Raum having been impressed with the 27-year-old Germany left-back during scouting missions this season. (Teamtalk), external
Manchester United 1-2 Leeds: What Carrick and Fernandes saidpublished at 22:51 BST 13 April
22:51 BST 13 April
Media caption,
Martinez red card is 'shocking decision' - Michael Carrick
Manchester United manager Michael Carrick, speaking to Sky Sports: "We didn't start the game particularly well. We obviously conceded when Leny Yoro gets a forearm smash in the back of the head and they score the first goal.
"They didn't decide to overturn that decision. That was a big moment in the game. We didn't quite have the rhythm, we didn't click, we had some moments but it wasn't quite there for large parts of the first half.
"But second half, I thought the boys the way they went about it, stayed positive and fought to get something out of it after another shocking, shocking decision to send [Lisandro Martinez] off. Two games in a row we've had decisions like that go against us but that one was one of the worst I've seen."
On the red card: "You can elbow Leny Yoro for the first goal, leaning arm obviously, you can throw your arm in Martinez's face and then as he's off balance because of that, he's half grappling, he half touches the back of his hair which pulls the bobble to come out.
"I don't even know what it looks like. It's not a pull, it's not a tug, it's not aggressive. He touches it and he gets send off.
"Worse of all, he gets send to overturn it, a clear and obvious error. Shocking."
More from Manchester United manager Michael Carrick, speaking to Sky Sports: "The boys went for it. It's football, sometimes you don't have good spells in games and other times you do.
"We know we can be better and do things better. We'll obviously look at that.
"The second half, could've got something out of the game, I'm pleased with how we went about that. We spoke at half-time about getting the next goal and trying to win the game. It was obviously more difficult when you're a man down."
On if break had an impact: "Doesn't make any difference, to be honest;"
On learning from the loss: "This is one game. We'll certainly look at it and look to improve. We've got another big game, an important game next week and a big end to the season.
"We're in a really good position. Tonight's disappointing, we didn't want to lose and we didn't want the referee's decisions to be so bad against us but we move on.
"We've got a big end to the season and there's a lot to be positive about."
Manchester United captain Bruno Fernandes, speaking to Sky Sports: "We gave the game away in the first half. We were not up to the game straight away with our intensity. We knew they wanted to press as 1v1, we had to be better on the first ball but even better on the second ball.
"We weren't great, we gave too much space away. We ended up going 2-0 down, we had time in the second half to turn it around but it was not possible."
On the message at half time: "For us to lift the standard on the intensity. To be more aggressive. That's it."
On Man Utd's 24-day break: "It is what it is. We are out of the FA Cup so we have to blame ourselves to be out of the game for so long. We had to prepare ourselves in the best way. We did but it wasn't enough to win the game."
On Lisandro Martinez's red card: "I'm not talking about the referee. If I talk about the referee I'm going to get in very big trouble because the rules are applied differently for everyone. You can see it also in the yellow cards. It's better that I don't say anything."
On what impact the result will have on their season: "It doesn't change anything that we want to achieve. We know that our aim is to stay in the top four. It's in our hands, we have to win our games, if we do that we'll be in the position we want to be in at the end of the season."
Did you know?
Lisandro Martinez is Manchester United's sixth red card in the Premier League since the start of last season, only Chelsea have received more in that time.
Bruno Fernandes has provided six assists for Casemiro in the Premier League this season, no other player has provided more than three.
After winning six of their first seven Premier League games under Michael Carrick upon his return, they've since won just one of their last four.
Daniel Farke makes four changes to his Leeds United side that started their penalty shootout win against West Ham in the FA Cup quarter-final last week.
Karl Darlow, Dominic Calvert-Lewin, Gabriel Gudmundsson and Brenden Aaronson all return for today's visitors.
Darlow replaces Lucas Perri in goal while Joe Rodon, Anton Stach and Lukas Nmecha drop out.
What does 'treatment and rehab' look like for De Ligt?published at 08:57 BST 13 April
08:57 BST 13 April
Simon Stone Manchester United reporter
Image source, Getty Images
"Licha back in the squad. Harry's new contract. Good day to be a centre-half."
Those were the words from Manchester United's Instagram account recently. Well, try telling that to Matthijs de Ligt.
Unlike Lisandro Martinez and Harry Maguire, De Ligt didn't spend the other week in the plush surroundings of Carton House Hotel in Maynooth, 20 miles outside Dublin.
While most of the players were having a getaway, De Ligt was back in Manchester keeping himself in shape for when he gets the green light to start playing again.
It is over four months since the Netherlands international last played.
While sources stress his mood is good and he remains optimistic about a return before the end of this season, he is also acutely aware there will need to be some kind of lead-in time and games are running out.
There's also the reality that being within touching distance of securing a return to the Champions League, which may also prove decisive in Michael Carrick getting the full-time head coach role, may mean the man currently in charge is unlikely to take risks.
Asked about the possibility last month, Carrick said he did not want to talk about surgery as a possible remedy to De Ligt's problem. It is understood that it isn't a path the player is speaking about either, and there is good reason for that.
No two cases are the same but Bournemouth midfielder Tyler Adams' recovery from back surgery in 2024 went well, yet it was nearly four months before he was ready to start games. There are also other examples of absences stretching on far longer.
For now, De Ligt's wait goes on. It might've been a good day for Martinez and Maguire, but it was a familiar and frustrating one for De Ligt.
When asked what De Ligt had been up to while his team-mates were at their enjoyable camp, Carrick replied: "Just treatment and rehab."
But what does 'treatment and rehab' look like?
Carrick made a joke of the question, but there was a serious undertone. "He is obviously in the gym and doing work, but he isn't ready for the grass yet," he continued.
"Unfortunately, that's the process you have to go through when you're injured. Sometimes it happens quicker; sometimes things don't quite go to plan and it's a bit slower. We're trying to get him back right."