Tennis: Wawrinka returns to training after knee injury

London: World No. 7 Stan Wawrinka has returned to training ahead of his scheduled comeback at the Mubadala World Tennis Championship (MWTC) exhibition event in December.
Three-time 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.
"First practice since July! Sooooo happy and excited!! Already killing the cones with the backhand!" Wawrinka said on his Twitter account along with a video of him back on the court.
Serbian Novak Djokovic and world No. 1 Rafael Nadal are also scheduled to play at the Abu Dhabi event, which starts on December 28.