Denmark's Caroline Wozniacki ended the year the women's world number one, but the consensus is that Serena Williams is the best player on earth. The problem as ever with the American, who will turn 30 next year, is her level of commitment to the sport as she continues to dabble in everything from acting to fashion design to her charity work in Africa.
Williams opened the year with a blast when she won the Australian Open for the fifth time by defeating comeback queen Justine Henin in a tough three-setter final.
She then played just two tournaments before turning up in Paris in May for the French Open where, as top seed, she lost in the quarter-finals to Australia's Samantha Stosur, who went on to lose to Italy's Francesca Schiavone in the final.
One again though charges that Williams was past her best were firmly quashed a few weeks later when she swept to her 13th Grand Slam title in imperious style at Wimbledon winning all seven games in straight sets including a lop-sided final against Russia's Vera Zvonareva.