David Moyes: "Robin van Persie and Wayne Rooney are set to return to training.
"They couldreturn to the fold today (Tuesday) and make the semi-final."
Vidic will miss the game, however, after he was sent off for a bad challenge on Eden Hazard.
Rafael was guilty of an even worse two-footed challenge on Cahill moments later, although the full-back connected with the ball rather than the player.
Moyes: “I thought Vidic wasn’t a sending-off, but I’ve seen Rafa’s and I think that could have been a sending off.
“We won’t throw the towel in until we can’t get there.
“The job is to try and finish first. I will keep trying to do that.
“Before today we’d lost one in six in the league, and I didn’t think there was a big difference between the teams today, not at all.
“The difference was our defending to set-pieces. Nothing else.”