Rafael Nadal insists Novak Djokovic cannot keep winning and he will be first in the queue ready to pounce when the Serb finally cracks.

Djokovic, who will dethrone Nadal as world number one on Monday, also took the Spaniard's Wimbledon title on Sunday with a 6-4, 6-1, 1-6, 6-3 win, ending his opponent's 20-match winning streak at the All England Club.

Brazil's Samba Girls are through to the quarter-finals with a game to spare and warned possible rivals the United States or Sweden that they won't let the World Cup slip away this time.

Superstar Marta fired the Brazilians into the knockout round with a double and set Rosana up for the third as they demolished former winners Norway 3-0 in Wolfsburg on Sunday night.

Having ensured his first trip to a Wimbledon final and first turn at No. 1 in the rankings with a thrill-a-minute victory, Novak Djokovic dropped to his back at the baseline, limbs spread wide, chest heaving.

Moments later, he knelt and kissed the Center Court grass, while his entourage bounced giddily in unison, huddling in a tight circle up in Djokovic's guest box.

Nine-time Wimbledon champion Martina Navratilova believes it would be foolish to write off the Williams sisters as a spent force and backed the American sisters to star at the U.S. Open.

Serena Williams missed 11 months of action after injuring her foot in a freak accident at a German restaurant after winning her fourth Wimbledon title last year and then battled life-threatening blood clots on her lungs.

Rafael Nadal takes an 11-4 winning record into his Wimbledon semi-final against Andy Murray, but insists history will count for nothing in Friday's Center Court blockbuster.

Nadal, the defending champion, is aware that Murray is riding a wave of emotion from a public desperate to see an end to Britain's 75-year wait to crown a new men's singles champion.

Not content with driving a Formula One car, Australian star Mark Webber now wants to fly planes and Qantas plans to help him.

The 34-year-old Red Bull driver used a B737 flight simulator ahead of the Australian Grand Prix in Melbourne this year and spent time at Heathrow airport in London on Wednesday in the cockpit of a A380 with a training captain.

Chelsea manager Andre Villas-Boas was quick to dismiss comparisons with Jose Mourinho as he used his official introduction at Stamford Bridge to insist he is not the new 'Special One'.

Villas-Boas worked for Mourinho as an opposition scout during his fellow Portuguese's time in charge at Porto, Chelsea and Inter Milan and has spent much of his brief managerial career following in the footsteps of the controversial coach.

When Maria Sharapova says her game is getting better and better at Wimbledon, it's hard to argue.

The fifth-seeded Russian, the only quarter finalist at the All England Club with a Grand Slam title to her name, dominated her match on Center Court on Tuesday, moving back into the semifinals for the first time since 2006.

Andy Murray's campaign to end Britain's 75-year wait for a Wimbledon men's singles champion could be boosted on Tuesday by Rafael Nadal's knife-edge survival battle to overcome a crippling left foot injury.

Murray, the fourth seed, sailed into the last eight with a straight sets win over Richard Gasquet and was safely back in his London home when scheduled semi-final opponent Nadal suffered a potentially tournament-ending blow.

Defending champion Serena Williams was dumped out of Wimbledon here Monday, losing to French ninth seed Marion Bartoli in straight sets 6-3, 7-6 (8/6).

Four-time winner Williams, who has only recently returned to tennis after a year-long lay-off because of health and injury problems, was always struggling to impose herself against her determined French opponent on Court One.