Roger Federer says he is retiring from pro tennis at age 41

Switzerland’s Roger Federer kisses the trophy after winning the Men’s Singles final match at Wimbledon Tennis Championships in London on July 16, 2017. (AP Photo/Alastair Grant, File)

Roger Federer is retiring from professional tennis at age 41 after a series of knee operations, closing a career in which he won 20 Grand Slam titles, finished five seasons ranked No. 1 and helped create a golden era of men’s tennis with rivals Rafael Nadal and Novak Djokovic.