Djokovic through after early test

Novak Djokovic resisted a stiff first-set challenge from Benjamin Becker to ultimately ease through to the third round of the US Open in less than two hours.

The world number one faced two set points against Becker but the German could not take advantage and Djokovic prevailed 7-6 (7/2) 6-2 6-2 in an hour and 51 minutes.