Wawrinka returns to training after knee injury

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.

(Reuters)

"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 number one Rafa Nadal are also scheduled to play at the Abu Dhabi event, which starts on Dec. 28.

(Reporting by Aditi Prakash in Bengaluru; editing by Amlan Chakraborty)