The world's top woman tennis player, Lindsay Davenport of the United States, has been knocked out of the Australian Open tournament, a loser in the quarterfinals to Belgian star Justine Henin-Hardenne, the eighth seed.

Henin-Hardenne dropped her first set against Davenport Tuesday but rallied for a 2-6, 6-2, 6-3 win. Davenport has been struggling recently with an injured ankle.

Henin-Hardenne's semifinal opponent will be Maria Sharapova, the fourth seed, who eliminated her Russian countrywoman Nadia Petrova today, 7-6, 6-4.

On the men's side of the open, fourth seed David Nalbandian defeated unseeded veteran Fabrice Santoro in straight sets. After a bruising first-set battle, the 24-year-old Argentine finished with a streak of 14 straight games against the Frenchman (7-5, 6-0, 6-0).

Nalbandian, hoping to advance to the second Grand Slam final of his career, next will face either number seven Ivan Ljubicic of Croatia or Marcos Baghdatis, the unseeded Cypriot who ousted American number two Andy Roddick in the fourth round.

Some information for this report was provided by AFP and AP.