MONTREAL, ON - AUGUST 12: Stan Wawrinka of Switzerland hits a return against Nick Kyrgios of Australia during day three of the Rogers Cup at Uniprix Stadium on August 12, 2015 in Montreal, Quebec, Canada. (Photo by Minas Panagiotakis/Getty Images)
MONTREAL, ON - AUGUST 12: Stan Wawrinka of Switzerland hits a return against Nick Kyrgios of Australia during day three of the Rogers Cup at Uniprix Stadium on August 12, 2015 in Montreal, Quebec, Canada. (Photo by Minas Panagiotakis/Getty Images)