FILE - In this July 8, 2016, file photo, Roger Federer of Switzerland receives medical attention during his men's semifinal singles match against Milos Raonic of Canada at the Wimbledon Tennis ... more 
FILE - In this July 8, 2016, file photo, Roger Federer of Switzerland receives medical attention during his men's semifinal singles match against Milos Raonic of Canada at the Wimbledon Tennis Championships in London. Federer says he will miss the Rio Olympics and the rest of the tennis season to protect his surgically repaired left knee. Federer writes Tuesday, July 26, 2016, on his Facebook page that he will skip the Summer Games, where the tennis competition starts next week, and has been advised by doctors to remain sidelined for the remainder of 2016. (AP Photo/Alastair Grant, File) less 
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Associated Press | Photo By Alastair Grant, File
Tue, Jul 26, 2016 2:09 PM EDT