World No. 1 Novak Djokovic has crashed out from the Rio Olympics in the first round after facing defeat from Juan Martin Del Potro on Sunday. Each of the two sets Sunday night required a tiebreaker, but Del Potro came out on top both times to secure a 7-6, 7-6 victory and advance to the second round. "Delpo was the better player and he deserved to win. That's sport," said Djokovic, whose Olympic singles record is stalled at a bronze from Beijing in 2008. br br Subscribe to OneIndia News Channel for latest updates on movies and related videos.