Serena Williams vs. Roberta Vinci - Rogers Cup Toronto, Friday August 14, 2015 [Getty Images]

Toronto, Canada - August 14 - Roberta Vinci (ITA) looks to return the ball to Serena Williams (USA) during Rogers Cup Tennis action at the Aviva Centre on August 14, 2015. (Cole Burston/Toronto Star via Getty Images)

Toronto Star Cole Burston