Roger Federer admits he will have to be at his best today if he is to see off Novak Djokovic and move one step closer to a record-equalling seventh Wimbledon title.

Federer beat Mikhail Youzhny 6-1, 6-2, 6-2 to set up a mouthwatering semi-final with Djokovic, who cruised past Germany’s Florian Mayer in straight sets on Court One.