STANFORD, Calif. (AP) — Patty Schnyder mixed up her shots just enough to keep Alisa Kleybanova off balance.

The fifth-seeded Schnyder of Switzerland displayed a nice array of power and finesse to get by the inconsistent Kleybanova 7-6 (8), 6-4 on Thursday in the second round of the Bank of the West Classic.

"Today, of course, I had a plan. It was just a matter of how many points she would allow me to do it," Schnyder said. "She was trying to dictate everything, whether winners or errors. ... I think she was so dominant it was tough for me to play. I had to mix it up a lot. It was her game plan to hit a lot of winners and also accept some errors."

Next up for Schnyder: a date with top-seeded Serena Williams in Friday's quarterfinals. And Williams will certainly be eager to play better tennis after rallying from a set down to beat 15-year-old Michelle Larcher de Brito of Portugal 4-6, 6-3, 6-2 on Wednesday night in her opening match.