"I thought today was a little bit better than my match in my first round," Serena said. "I felt like I was moving better and I had better energy. Yeah, just felt all around a lot better."

Serbia's Novak Djokovic, the 2008 champion, survived a shaky start to win while in-form Russian Nikolay Davydenko and Australia's Lleyton Hewitt advanced in straight sets.

Denmark's Caroline Wozniacki also sailed through, beating Germany's Julia Goerges 6-3, 6-1 but, in a tournament bereft of major upsets, there were at least two surprises to spice things up.

The former world No. 1 Ana Ivanovic bowed out after a 6-7, 7-5, 6-4 loss to unseeded Argentine Gisela Dulko while Marcos Baghdatis defeated Spain's David Ferrer, the 17th seed.

Rollercoaster

Baghdatis has been plagued by injuries since his rollercoaster ride to the 2006 Australian Open final but showed he is getting back to his fighting best after winning 4-6, 3-6, 7-6, 6-3, 6-1.

"I saw a window open, so that's how it went," the Cypriot said.

Ivanovic made the final in Australia in 2008 and won the French Open that same year but her career has been in freefall ever since and she has slipped to 21st in the rankings despite trying desperately to resurrect her fortunes.

"It's a process. I think I just have to be patient," she said.

"Some matches it's there, some not. I just have to sort of keep my head up and try to improve."

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