Carlsbad, CA (AHN) - Sania Mirza upset No. 12 seed Shahar Peer with a 6-3, 4-6, 6-2 win during second round action at the Acura Classic on Tuesday.

Mirza halted Peer's rally by charging the net and shortening her stroke.

"I really didn't want to spend so much time on the court," said Mirza who defeated her doubles partner to move on to the third round. "We all know that [Peer] is one of the best on the tour at running down shots. If I keep hitting and ripping from behind the baseline, she's going to keep tracking down balls.

"I'm happy because it was a very tough first-round match," Mirza said. "But we both are not happy because we are friends, and it's hard to play a friend."

Second-seeded Jelena Jankovic, the third-ranked player in the world, defeated Vania King 6-3, 6-0 in a second-round night match.

Martina Hingis, the No. 7 seed, struggled in the first set but managed to pick up a 7-5, 6-2 second-round win over Michaella Krajicek.

Hingis made 20 unforced errors in the first set, compared to 16 winners. Krajicek, though, finished with 47 unforced errors to 27 for Hingis overall.

In other second-round action, Nadia Petrova beat Elena Bovina 6-3, 7-5 in a hard-fought match.

No. 5 Marion Bartoli downed Aiko Nakamura, 7-6 (4), 6-1 while No. 15 seed Sybille Bammer disposed of Kateryna Bondarenko 6-4, 7-6 (5) and Lucie Safarova defeated Meilen Tu 6-4, 6-3.