Andy Murray of Britain reacts during the men's singles match against Novak Djokovic of Serbia at the ATP World Tour Finals in the O2 Arena in London, Britain, on Nov. 7, 2012. Djokovic won 2-1. (Xinhua/Yin Gang)
Andy Murray of Britain reacts during the men's singles match against Novak Djokovic of Serbia at the ATP World Tour Finals in the O2 Arena in London, Britain, on Nov. 7, 2012. Djokovic won 2-1. (Xinhua/Yin Gang)