TORONTO, ON - AUGUST 09: Stefanos Tsitsipas of Greece plays a shot against Novak Djokovic of Serbia during a 3rd round match on Day 4 of the Rogers Cup at Aviva Centre on August 9, 2018 in Toronto, Canada. (Photo by Vaughn Ridley/Getty Images)
TORONTO, ON - AUGUST 09: Stefanos Tsitsipas of Greece plays a shot against Novak Djokovic of Serbia during a 3rd round match on Day 4 of the Rogers Cup at Aviva Centre on August 9, 2018 in Toronto, Canada. (Photo by Vaughn Ridley/Getty Images)