BANGALORE, India — Playing in her first match since the Australian Open, Serena Williams overcame a shaky start today to defeat Israel's Tzipora Obziler for a place in the quarter finals of the $600,000 WTA Tour's Bangalore Open.

Williams, the world No. 10 and tournament third seed, defeated Obziler 7-5, 6-0 in 1 hour and 15 minutes, despite being broken twice in the first set.

"I did not feel 100 percent," said Williams, blaming it on the long layoff. It was her first game of the tournament after receiving a bye in the first round.

"I made too many errors today," she said, adding that some line calls had not helped. "There were a lot of bad calls out there."

Fourth seed Patty Schnyder of Switzerland had to come from a set down to defeat Aiko Nakamura of Japan.

The world No. 12, who lost the first set tie-break rather tamely, came back strongly to win 6-7 (1), 6-4, 6-2 in a match that lasted 1 hour 57 minutes.

"A win is a win. I was not comfortable for the first hour or so, but I kept firing myself up," said Schnyder.

In other second-round matches, Akgul Amanmuradova of Uzbekistan overcame Agnes Szavay of Hungary 4-6, 7-6 (4), 6-4, and Anastasia Rodionova of Russia beat Austria's Sybille Bammer 7-6 (5), 6-2.