Angelique Kerber, of Germany, reacts after losing a point to Serena Williams during the championship match of the Bank of the West Classic tennis tournament on Sunday, Aug. 3, 2014, in Stanford, Calif. (AP Photo/Marcio Jose Sanchez)

Stanford Tennis

Angelique Kerber, of Germany, reacts after losing a point to Serena Williams during the championship match of the Bank of the West Classic tennis tournament on Sunday, Aug. 3, 2014, in Stanford, Calif. (AP Photo/Marcio Jose Sanchez)

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