Bank of the West Classic - Day 1 [Getty Images]

STANFORD, CA - JULY 28: Ajla Tomljanovic of Croatia returns a shot to Andrea Petkovic of Germany 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)

Getty Images Sport Ezra Shaw