TORONTO, ON - JULY 26: Novak Djokovic (L) and Nenad Zimonjic (R) of Sebia play a doubles match against Philip Bester and Adil Shamasdin of Canada during Day 2 of the Rogers Cup at the Aviva Centre on July 26, 2016 in Toronto, Ontario, Canada. (Photo by Vaughn Ridley/Getty Images)