Serena Williams of US hits a return against Yaroslava Shvedova of Kazakhstan during their 2016 US Open Women's Singles match at the USTA Billie Jean King National Tennis Center in New York on September 5, 2016. / AFP PHOTO / EDUARDO MUNOZ ALVAREZEDUARDO MUNOZ ALVAREZ/AFP/Getty Images ORG XMIT: 2016 U.S. ORIG FILE ID: AFP_FW38B