Melbourne  - A group of 65 sportsmen already challenged it before Belgian courts, but the new World Anti-Doping Code received a severe blow Wednesday from one of the biggest names in sport, tennis world number one Rafael Nadal.

The Spaniard is outraged about a rule that forces high-performance sportsmen to say where they are going to be for an hour each day, 365 days a year.

"I think it shows a lack of respect for privacy," Nadal said after qualifying for the semifinals of the Australian Open. "I think it's a disgrace, particularly knowing what our sport is like."

Melbourne, Jan. 28 : Spain''s Fernando Verdasco has entered his first grand slam semi-final. In an upset result at this year''s Australian Open, 14th seed Verdasco beat fifth-seeded Jo-Wilfried Tsonga of France 7-6 (7-2) 3-6 6-3 6-2.

Having led his country in the absence of Rafael Nadal to victory over Argentina in Davis Cup last year, Verdasco now has the chance to register another upset in the semis where he could face the world No. 1.

Tsonga, last year''s beaten Australian Open finalist, had his chances, only to squander them with a lack of discipline on big games.

Melbourne, Jan. 28: Jelena Dokic has revealed she briefly retired from tennis in mid-2007, before being drawn back to the game for what she vowed would be one last attempt to resurrect her fallen career.

"I actually made the decision," she told a small group of journalists today upon returning to Melbourne Park after Tuesday night''s 6-4, 4-6, 6-4 loss to third seed Dinara Safina in the quarter-finals of the Australian Open.

"And about four days later, I changed my mind," the Sydney Morning Herald quoted her, as saying.

Melbourne, jan. 28: Serena Williams came back from the brink to defeat Russia''s Svetlana Kuznetsova 7-5, 5-7, 6-1 in the Australian Open quarter-finals, ensuring the women''s semis would not be an all-Russian affair.

The eighth-seeded Kuznetsova served for the match in the 10th game of the second set but was broken by Williams, who is chasing a fourth title at Melbourne Park.

Melbourne - Serena Williams survived a sweltering "out-of-body experience" Wednesday, picking up her game when the roof was closed at the Rod Laver arena and preventing Russian domination of the semi-finals of the Australian Open.

The nine-time Grand Slam winner broke the spell in temperatures of 42 degrees and climbing when, under the heat rule, the roof was closed at the end of the first set, which seemed to give Williams new life.

Melbourne, Australia - Jelena Dokic said that an enthusiastic welcome home from frenzied fans at the Australian Open has truly marked the start of her second career.

The 25-year-old was still beaming on Wednesday, a day after losing after an improbable run into the quarter-finals of the Grand Slam.

"It was quite a ride from the first round onwards," the number 187, who is set for a big rise on the WTA from Monday, told the Seven television network. "I got a good start and things just went crazy from there."