STANFORD, Calif.—Ai Sugiyama ousted fourth-seeded Daniela Hantuchova of Slovakia from the Bank of the West Classic on Wednesday, winning 6-3, 6-1 to advance to the quarterfinals.

The unseeded Sugiyama, from Japan, fell behind 3-0 in the first set then won the next nine games before Hantuchova held serve to make it 3-1 in the second set.

Sugiyama will face Slovakia’s Dominika Cibulkova, a 6-2, 6-3 second-round winner over Kateryna Bondarenko of the Ukraine on Wednesday.

Second-seeded Anna Chakvetadze of Russia beat Shahar Peer of Israel 6-3, 6-4. Chakvetadze lost the first game of each set and trailed 4-3 in the second before winning the final three games.



Tennis Championship

INDIANAPOLIS—Gilles Simon used a simple serve-and-volley game to beat Benjamin Becker 7-5, 3-6, 6-0 and reach the quarterfinals.

Also advancing was Germany’s Tommy Haas, the fifth seed. He used an accurate service game to sweep American John Isner 6-3, 6-4.

Isner won just 5-of-27 of Haas’ first serves and 5-of-26 second serves.Third-seeded Dmitry Tursunov of Russia, the defending champion, advanced to the quarterfinal round when his opponent, American Wayne Odesnik, withdrew with a back injury before the night’s final match.

Earlier, Paul Capdeville of Chile won 23 of his 27 of his first-serve points and swept qualifier Joseph Sirianni of Australia, 6-3, 6-4.