Roger Federer says Wimbledon's increased enforcement of its all-white clothing policy at this year's tournament is "too strict." Over the fortnight, many players have been warned that their undergarments, headbands, wristbands and colored trims are all in violation of the club's long-standing rule.

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Federer said after his quarterfinal win against Stan Wawrinka on Wednesday that photographs of past champions show "some colors" and that he hopes the tournament reconsiders the scope of its all-white clothing rules in the future.

"My personal opinion, I think it's too strict," he said. "But I respect. I understand. Maybe one day they'll loosen up the grip again a bit, but that's the time we go through right now. "

Richard Lewis, chief executive of the All-England Club, said in a statement that "the rule is almost entirely in white."

"We felt the time was right to make accessories such as undergarments, headbands and wristbands consistent with the policy we were applying to the shirts, shorts and socks," Lewis said.