Roger Federer wins the ATP World Tour Finals at O2 Arena in London . Federer beats Jo-Wilfried Tsonga of London in his 100th career final . Record second win in season-ending finals for the French star . Consecutive titles in Basel , Paris , where he also beat Tsonga in the final , and at the season-ending championships have seen the Swiss maestro reclaim the No.3 spot in the world from Britain 's Andy Murray . Max Mirnyi and Daniel Nestor win doubles title .
Roger Federer wins the ATP World Tour Finals at O2 Arena in London . Federer beats Jo-Wilfried Tsonga of London in his 100th career final . Record second win in season-ending finals for the French star . Max Mirnyi and Daniel Nestor win doubles title .