TOKYO: World number one Novak Djokovic became the latest big name to crash out of the Tokyo Olympics on Friday as a defeated American swimmer aimed doping accusations at a Russian rival, drawing a furious response from Moscow.As the athletics began in an Olympic Stadium deprived of spectators by anti-coronavirus measures, Ethiopia’s Selemon Barega timed his run to perfection to win the first track gold in the men’s 10,000 metres.But Djokovic’s bid for a calendar Golden Grand Slam —...