Second placed United could be without the attacking threats of Anthony Martial, Marcus Rashford and Mason Greenwood who are all hoping to be fit in time to face Graham Potter's Brighton.
Martial missed training on Friday with a reported knee issue picked up on France duty, while Rashford and Greenwood’s pulled out of their England squads.
Victor Lindelof also missed training with an ongoing back complaint, while Ole Gunnar Solskjaer refused to confirm whether David De Gea or Dean Henderson will start in goal on Sunday.
Scroll down and click through to see who is struggling to be fit for Sunday and when they can be expected to return.
Victor Lindelof also missed training with an ongoing back complaint, while Ole Gunnar Solskjaer refused to confirm whether David De Gea or Dean Henderson will start in goal on Sunday.