Just nine months after returning from his career-threatening injury, Nadal became the first player to hold, lose and regain the year-end No. 1 spot twice by beating Stanislas Wawrinka 7-6 (5), 7-6 (6) at the ATP finals. Roger Federer and Ivan Lendl did it once in their careers.
Murray needed a set to find his rhythm against 47th-ranked Florian Mayer, then rolled the rest of the way to a 7-6 (2), 6-2, 6-2 victory in the third round of the U.S. Open.
Each took a step forward Friday, shaky at moments and sensational in others, in second-round victories. The top-seeded Djokovic faced two early set points, while defending champion Murray had to go four sets.
From the lawns of Wimbledon to the lochs of Scotland, all of Britain can celebrate. Andy Murray made it possible Sunday, winning his country's hallowed tennis tournament to become the first British man in 77 years to raise the trophy at the All England Club.
Of the four men preparing for Friday's semifinals at Wimbledon, nobody has had skated through a less-taxing road than the top-ranked and top-seeded Serb, who remains the odds-on favorite to win his seventh Grand Slam title.
Mike and Bob Bryan moved a win away from their fourth straight major title — the "Bryan Slam" — with a five-set victory over Rohan Bopanna and Edouard Roger-Vasselin.
The 23rd-seeded Lisicki, who matched Williams' power in her stunning victory Monday over the world's No. 1 player, came back less than 24 hours later and hit six drop shots for winners in dissecting the 46th-ranked Kaia Kanepi.
Djokovic, the winner of six major titles, seeks to become the eighth man to complete a career Grand Slam, but he'll have to get past seven-time French Open champion Nadal first.
Tennis is adopting the biological passport program and increasing the number of blood tests as part of a new anti-doping drive that players themselves have demanded.
Serena Williams spent most of the past week downplaying the prospect of returning to the top of the rankings. Then it happened and she couldn't hold back the tears.
The 15-time Grand Slam winner will replace top-ranked Victoria Azarenka in next week's rankings after coming from a set down to beat former Wimbledon champion Petra Kvitova 3-6, 6-3, 7-5 on Friday in the quarterfinals of the Qatar Open.
The ATP was not doing enough to protect players' health and the increase in hard-court events will lead to long-term injuries that will affect players after they retire, Rafael Nadal said Tuesday.