STANFORD (CBS/AP) -- Top-ranked Serena Williams won in her first match since defaulting in a doubles match with sister Venus at Wimbledon, beating Karolina Pliskova 7-5, 6-2 on Wednesday night in the second round of the Bank of the West Classic.
At Wimbledon, Williams tried to play through a viral infection that caused her to lose her equilibrium during the doubles match. On Wednesday night, encouraged by a large crowd, Williams fought through a tough first set before she found her legs and took control of the match with a big second set.
In the quarterfinals, Williams will meet the winner of Thursday's match between fifth-seeded Ana Ivanovic and qualifier Carol Zhao, a Stanford sophomore playing in her first WTA event.
Earlier, Varvara Lepchenko beat second-seeded Angieszka Radwanska 6-3, 3-6, 6-4 to advance to the quarterfinals.
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