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STANFORD, CA - AUGUST 4: Sabine Lisicki of Germany reacts after missing a shot against Kimiko Date-Krumm of Japan during day two of the Bank of the West Classic at the Stanford University Taube Family Tennis Stadium on August 4, 2015 in Stanford, California. (Photo by Lachlan Cunningham/Getty Images)

STANFORD, CA - AUGUST 4: Sabine Lisicki of Germany reacts after missing a shot against Kimiko Date-Krumm of Japan during day two of the Bank of the West Classic at the Stanford University Taube Family Tennis Stadium on August 4, 2015 in Stanford, California. (Photo by Lachlan Cunningham/Getty Images)