Only two of the four FA Cup semi-finalists are known, but Sunday's draw threw up the possibility of a London derby and a Merseyside derby.
Liverpool, who beat Stoke on Sunday, could face Everton if the Toffees overcome Sunderland in their replay.
Liverpool manager Kenny Dalglish told ITV: "The people on Merseyside have two clubs they can be proud of. They [Everton] have a difficult game going to Sunderland to try and get themselves through; we are there and whoever you were going to get was going to be really difficult. If it's a Merseyside one fine, but it's a difficult hurdle for Everton to go to Sunderland.''
On the other side of the draw, Chelsea are already through as they beat Leicester 5-2 and could face high-flying Tottenham if the North London club beat Bolton when they meet again.
The two clubs abandoned their quarter-final match on Saturday after Bolton midfielder Fabrice Muamba suffered a cardiac arrest on the pitch.