"Now I feel like I can beat everyone," said Davydenko, who is trying to win a first Grand Slam title. "Before no, mostly I was losing against these guys (top players), but now I can beat everyone. It's a good feeling."

In front of his home crowd, former world No. 1 Lleyton Hewitt was rarely troubled as he cruised to a straight sets victory over Brazil's Ricardo Hocevar in one hour and 40 minutes.

Last year's semifinalist Fernando Verdasco had a tough opening encounter against Australian Carsten Ball, dropping the first set and being pushed hard in the second before coming through 6-7 (4), 7-6 (1), 7-5 and 6-2.

On the women's side, top seed Serena Williams and her sister Venus wasted little time in reaching the second round.

Serena, the defending champion and world No.1, swept aside Poland's Urszula Radwanska 6-2, 6-1 on Rod Laver Arena, and Venus proved far too good for Czech Lucie Safarova, who she downed 6-2, 6-2 in just 72 minutes.

Serbs Jelena Jankovic, the eighth seed, and 20th seed Ana Ivanovic also had comfortable victories.

Jankovic downed Romania's Monica Niculescu 6-4, 6-0 and Ivanovic outclassed American qualifier Shenay Perry 6-2, 6-3.

Polish 10th seed Agnieszka Radwanska, the elder sister of Urszula, was another easy victor, thrashing German Tatjana Malek 6-1, 6-0.

Nadia Petrova, the 19th seed, is also through after downing Romanian Edina Gallovits 6-3 and 6-4.

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