FILE PHOTO - Tennis - Wimbledon - London, Britain - July 3, 2017 Switzerland’s Stan Wawrinka reacts during his first round match against Russia’s Daniil Medvedev REUTERS/Andrew Couldridge
(Reuters) - World number seven Stan Wawrinka has returned to training ahead of his scheduled comeback at the Mubadala World Tennis Championship (MWTC) exhibition event in December.
Three-times grand slam winner Wawrinka, 32, last played at Wimbledon in July before withdrawing from the U.S. Open and announcing the end of his season in August to undergo surgery following a recurring knee problem.
