A multiple exposure photograph shows Britain's Murray as he serves to Serbia's 

A multiple exposure photograph shows Britain's Murray as he serves to Serbia's Djokovic during their men's singles tennis match at the ATP World Tour Finals in London
A multiple exposure photograph shows Britain's Andy Murray as he serves to Serbia's Novak Djokovic during their men's singles tennis match at the ATP World Tour Finals in the O2 Arena in London November 7, 2012. REUTERS/Dylan Martinez (BRITAIN - Tags: SPORT TENNIS)
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