(AP) Novak Djokovic is feeling fresh heading into Wimbledon's semifinals.
He has spent a total of 9 hours, 43 minutes on the court over his first five victories, the least of all four semifinalists. That's 72 minutes less than in 2011, when he won Wimbledon for the first time.
The top-seeded Serb hasn't lost a set. His opponent on Friday, eighth-seeded Juan Martin del Potro, has also swept all 15 sets he's played, but he's been dealing with a balky left knee that he hyperextended first on Saturday, then again in his quarterfinal win over David Ferrer.
The other semifinal pits No. 24 Jerzy Janowicz against No. 2 Andy Murray, who is trying to become the first British men's Wimbledon champion since 1936.