Serbia's Novak Djokovic reacts as he retires from his quarter final match against Czech Republic's Tomas Berdych with an injury at Wimbledon, London, on July 12. [Photo/Agencies]

Djokovic, a three-time champion at the All-England Club, did say he would think about taking time away from the tour because of an injured right elbow that became so painful Wednesday he stopped in the second set of his quarterfinal against Tomas Berdych.

Murray, who won Wimbledon in 2013 and 2016, will consider an extended absence, too, after his sore left hip clearly hampered him while being beaten 3-6, 6-4, 6-7 (4), 6-1, 6-1 in the quarterfinals by Sam Querrey.

"We both had a very long, very tough year, a lot of matches, a lot of emotions, a lot of things in play," Djokovic said. "Our bodies have taken a lot physically."While No 3-seeded Federer will face No 11 Berdych next, and No 24 Querrey - the first US man in a Grand Slam semifinal since 2009 - meets No 7 Marin Cilic, No 1 Murray and No 2 Djokovic are done at Wimbledon this year.

So is No 4 Nadal, a two-time champion who lost in the fourth round.

"Of course I'm surprised," Federer said, "to see them going out."No one should be surprised that he is sticking around.

AP