Chelsea will face Manchester City if they overcome Manchater United in their quarter-final replay.
The Blues staged a remarkable comeback at Old Trafford to earn a 2-2 draw after being 2-0 at half-time.
Second half goals from Ramires and Eden Hazard, spared Rafa Benitez's blushes as Unilook doomed like running away with the tie.
The other semi-final will see Wigan face the winners of the Millwall v Blackburn Rovers tie which ended 0-0 a the New Fen earlier in the day.