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(101129) -- LONDON, Nov. 29, 2010 (Xinhua) -- Rafael Nadal of Spain serves during the single's final against Roger Federer of Switzerland in 2010's ATP World Tour Finals in London, Britain, Nov. 28, 2010. Federer won 2-1 to claim his fifth season-ending title. (Xinhua/Zeng Yi) (KEYSTONE/XINHUA/Guo Dayue)