Louis van Gaal is still likely to be without new signing Marcos Rojo for the match against MK Dons as he continues to work through a work permit issue.
The Argentine, who arrived at Old Trafford at the end of last week for £16m, missed the 1-1 draw with Sunderland on Sunday.
Rojo's work permit situation is not likely to be resolved before the Capital One Cup clash against MK Dons, leaving Van Gaal short of defensive options.
The Dutch coach saw Chris Smalling leave in the first half of the game at the Stadium of Light with a groin injury - the England defender will have an assessment ahead of Tuesday's game.
Michael Keane replaced Smalling and as United are still without Jonny Evans, Van Gaal could again be forced to play the inexperienced back three of Tyler Blackett, Keane and Phil Jones.
Jones is the most experienced of those three at 22, but he has only played 106 matches for Manchester United. Another defender, Rafael, has been back in training but may not be fit enough for first team duty.
Spanish midfielder Ander Herrera will also be assessed before kick-off.
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