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(101128) -- LONDON, Nov. 28, 2011 (Xinhua) -- Fans celebrate for Roger Federer's 100th finals in ATP World Tours during the final match between Federer and Jo-Wilfried Tsonga of France, in 2011's ATP World Tour Finals, in London, Britain, Nov. 27, 2011. Federer won 2-1 to claim the tital for the sixth time. (Xinhua/Zeng Yi)