Ryan Fraser will be assessed throughout the week after picking up a muscle injury in the 1-1 draw at West Ham.
The former AFC Bournemouth player has been in the best form of his United career so far in recent games and will be eager to retain fitness and face Brentford this week with a Scotland World Cup clash against Ukraine looming.
Fraser was watched by Steve Clarke and John Carver with the duo assessing whether he is recalled to the Scots' squad for the encounter at Hampden Park next month.