Manchester United reached the quarter-finals after beating Blackburn earlier today.
Goals from Marcus Rashford and Zlatan Ibrahimovic helped United come from behind to seal a 2-1 win and set up a trip to Stamford Bridge.
Ahead of the match United have key games including a Europa League trip to St Etienne and next Sunday's League Cup final with Southampton.
Manchester United boss Jose Mourinho believes Chelsea are favourites for their FA Cup clash
And Mourinho insists Chelsea can focus more on the FA Cup quarter-final as they are not in Europe and already have the Premier League title wrapped up.
"Probably Chelsea can only think about that [the FA Cup] because I think they are champions and they have nothing else to fight for," Mourinho said.
"The FA Cup is something I believe is important for them.
Manchester United player ratings against Blackburn
Sun, February 19, 2017
Express Sport brings you Manchester United's player ratings from their FA Cup clash with Blackburn Rovers
Man Utd via Getty Images
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Who impressed for Manchester United against Blackburn?
Zlatan Ibrahimovic scored Man United's winner in the fifth round clash against Blackburn
"I have to play St Etienne [on Wednesday], I have to play the [League Cup] final, I have to play hopefully another opponent in the Europa League.
"I have to fight for a top-four position in the Premier League.
"I have so many things to think about."