Andrey Rublev of Russia returns the ball against Stanislas Wawrinka of Switzerland during the Chennai Open Tennis Tournament in Chennai on January 6, 2016. AFP PHOTO / STR / AFP / STR (Photo credit should read STR/AFP/Getty Images)
Andrey Rublev of Russia returns the ball against Stanislas Wawrinka of Switzerland during the Chennai Open Tennis Tournament in Chennai on January 6, 2016. AFP PHOTO / STR / AFP / STR (Photo credit should read STR/AFP/Getty Images)