Andy Murray hits back after gruelling first set to reach US Open third round

Andy Murray made his way into round three (Julia Nikhinson/AP)

Andy Murray recovered from a difficult start to defeat wild card Emilio Nava and reach the third round of the US Open for the first time in six years.

The reward for Murray knocking out 24th seed Francisco Cerundolo in round one was a second-round assignment against 203rd-ranked American Nava, who had claimed his first tour-level victory against John Millman on Monday.