The draw for the FA Cup semi-final was conducted on Sunday.
Manchester City will play Sheffield United, while Brighton will play Manchester United or Fulham.
Six-time champions City reached the last four with a thumping 6-0 win over Burnley on Saturday.
The Blades defeated Blackburn 3-2 on Sunday to book their spot.
Brighton ended League Two Grimsby’s dream run to the last eight with a 5-0 win.
Both semi-finals will take place at Wembley Stadium the weekend of April 22-23.