Manchester United and West Ham know that the winner of their FA Cup quarter-final replay will take on Everton in at Wembley in the last-four.
The two sides, who drew 1-1 yesterday at Old Trafford, were pitched against the Toffees, who knocked Chelsea out on Saturday.
Crystal Palace and Watford, who have both reached a final but never won an FA Cup, were drawn together in the other semi-final.
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The semi-final fixtures will take place on the weekend of April 23rd and 24th at Wembley.