Michael Carrick will speak to the media ahead of Man Utd's game against Como in the Champions League.

Santos to join Carrick

Youngsters to step up?

If Martinez and Heaven are not included in the squad for the game, Carrick will be left with just two senior centre-backs, Maguire and De Ligt, but the latter has only just returned to fitness from back surgery and has not played since November 30 last year.

Shaw was also missing from training after missing United's last two games against Atletico and Leeds. Shaw played the full game as United drew 1-1 with Tottenham, but picked up a knock in that match at Old Trafford.

Dorgu remains a longer-term absentee after pulling out of international duty, which means Dalot and Mazraoui could be the only fit senior full-backs in the squad against Como.

Harry Amass and Jaydan Kamason, full-backs from the academy, trained with the main group on Tuesday, while youngster Dan Armer, a centre-back, also took part.