Novak Djokovic beats Roger Federer in Wimbledon final

Novak Djokovic has beaten Roger Federer to become the Wimbledon men's champion for 2014.

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Serena and Venus Williams forfeit Wimbledon doubles

Serena Williams was forced to pull out of her doubles match with sister Venus at Wimbledon after she became unwell on court.

In scenes which were often uncomfortable to watch, the American appeared dizzy on court and was unable to hit or bounce the ball.

Officials treat Serena Williams during the match. Credit: Reuters

After she served four consecutive double faults, umpire Kader Nouni came down to speak to the sisters as the worrying situation continued.

The sisters eventually forfeited the match against German Kristina Barrois and Swiss Stefanie Voegele after going 3-0 down in the first set.

The commentator said Williams, who has won five Wimbledon singles titles, was a "shadow of herself" and appeared to be "sleepwalking" through the match.

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