MELBOURNE, Australia — The first round is about survival, finding that little bit extra when things aren't going great and there's an unseeded player across the net, hungry for an upset.

Serena Williams and Justine Henin handled it, but Jelena Jankovic and Lindsay Davenport struggled to find top form Monday at the Australian Open. All managed to advance — unlike ninth-seeded Andy Murray of Britain, who became the first high-profile casualty at the season-opening Grand Slam.

"I think I was a wee bit nervous out there," defending champion Williams admitted after beating Jarmila Gajdosova 6-3, 6-3 in the first match on center court.

It didn't help that brisk breezes were swirling around Melbourne Park, and the bright sun played havoc with serve tosses and overheads.

Top-ranked Henin, making her first appearance here since defaulting with an upset stomach in the 2006 final against Amelie Mauresmo and sitting out last year with personal problems, ran off the last six games to finish off a 6-2, 6-2 victory over Japan's Aiko Nakamura.

Murray lost 7-5, 6-4, 0-6, 7-6 (5) to Jo-Wilfried Tsonga of France, who gave Andy Roddick a tough time in the first round last year.