Rogers Cup ATP 1000 tournament semi-final action [Getty Images]

TORONTO, ON- JULY 30 - Stan Wawrinka hides his head after missing an easy shot against Ken Nishikori. The player from Japan won against Wawrinka at the Rogers Cup ATP 1000 tournament in semi-final action at the Aviva Centre in Toronto. July 30, 2016. (Steve Russell/Toronto Star via Getty Images)

Toronto Star Steve Russell