Switzerland's Roger Federer plays a return to Poland's Hubert Hurkacz during the men's singles quarterfinals match of the 2021 Wimbledon Tennis Championships. Federer announced last Thursday he is retiring from tennis. (Kirsty Wigglesworth/AP PHOTO)
By Howard Fendrich AP TENNIS WRITER Roger Federer is retiring from professional tennis at age 41 after a series of knee operations, closing a career…
