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Record breaker Roger Federer

Serena Williams added another trophy to her cabinet in Stanford © Getty Images

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• Profile: Roger Federer

Roger Federer has spoken of his delight after finally passing Pete Sampras' previous record of 286 weeks as world No. 1.

Federer has revived his career this year and his victory at Wimbledon took him back to the top of the world rankings. At that point he was guaranteed to break Sampras' record, with no movement in the lists for at least a fortnight, but it was officially confirmed on Monday and it is a record the Swiss - a 17-time grand slam winner - will cherish.

"I'm so happy I'm at the age I am right now, because I had such a great run and I know there's still more possible," Federer said. "To enjoy it right now, it's very different than when I was 20 or 25. I'm at a much more stable place in my life. I wouldn't want anything to change. So this is very, very special right now."

Federer is 75 ranking points ahead of Novak Djokovic and will take the world No.1 spot with him into the Olympics, which take place at his beloved Wimbledon.

Serena Williams racked up her 43rd career singles title at the Bank of the West Classic and fired a chilling warning to her rivals by insisting she feels as if she is improving.

Williams showed no signs of a hangover from her Wimbledon success by storming to a straight-sets win over Coco Vandeweghe. It was her 28th win from her past 29 games, with her most recent defeat coming at the hands of Virginie Razzano in the first round of the French Open.

"I've never felt this fit, this strong, this happy to play - and I think I can be even better," Williams said. "I want to sustain this momentum and build on what I did at Wimbledon. I'm going to get back on the grass now for the Olympics - I'm not sure when I'm heading back to London, but I'll do it as soon as I can."

The win cemented her position at No. 4 in the world, behind No. 1 Victoria Azarenka, with the top ten unchanged.

Laura Robson was a big mover in the rankings, with her run to the semi-finals of the Italia Open launching her into the top 100 at 91.

Heather Watson had a fine time in Stanford, reaching the second round in the singles and taking the doubles title.

In making it to the second round, she has moved up to 71 in the world and replaces Anne Keothavong as Britain's No. 1 for the first time in her career.

Men's rankings: 1. Roger Federer (SWI), 2. Novak Djokovic (SBR), 3. Rafael Nadal (ESP), 4. Andy Murray (GBR), 5. David Ferrer (ESP), 6. Jo-Wilfried Tsonga (FRA), 7. Tomas Berdych (CZE), 8. Janko Tipsarevic (SRB), 9. Juan Martin Del Potro (ARG), 10. Nicolas Almagro (ESP).

Women's rankings: 1. Victoria Azarenka (BLR), 2. Agnieszka Radwanska (POL), 3. Maria Sharapova (RUS), 4. Serena Williams (USA), 5. Sam Stosur (AUS), 6. Petra Kvitova (CZE), 7. Angelique Kerber (GER), 8. Caroline Wozniacki (DEN), 9. Sara Errani (ITA) 10. Marion Bartoli (FRA)

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