Victor Valdes is in line to make his first Manchester United start this week, report The Telegraph.
The goalkeeper is United's only signing this January, acquired as a free agent having spent the past two months training with the club.
If he can come through the clash and help United to a win against the minnows, he can in return earn himself more first team opportunities.
With no European football, and out of the Capital One Cup, the FA Cup is the only competition outside of the Premier League in which Louis van Gaal has a chance to rotate players.
With David de Gea in superb form for the first team, there is nothing to gain from taking him out of the side to give Valdes a chance in the league, but the cup provides an ideal chance to do it.
The only factor which could see Valdes remain on the bench is if he is assessed not ready to take the field for fitness reasons, in which case United could seek to delay his debut until the fifth round provided they do not suffer a shocking upset at Cambridge.