Wimbledon tennis: Injured Serena Williams exits, Roger Federer advances 0 8 29 Jun 2021 18:53 United Press International (UPI.com) Twenty-three time Grand Slam champion Serena Williams was forced to retire from her first-round match at Wimbledon 2021 due to an injury Tuesday in London. Women's No. 1 Ash Barty and men's No. 8 Roger Federer advanced.