STANFORD, CA - JULY 28: Samantha Stosur of Australia returns a shot to naomi Osaka of Japan during Day 1 of the Bank of the West Classic at the Taube Family Tennis Stadium on July 28, 2014 in Stanford, California. (Photo by Ezra Shaw/Getty Images)
STANFORD, CA - JULY 28: Samantha Stosur of Australia returns a shot to naomi Osaka of Japan during Day 1 of the Bank of the West Classic at the Taube Family Tennis Stadium on July 28, 2014 in Stanford, California. (Photo by Ezra Shaw/Getty Images)