Djokovic through

World number four Novak Djokovic was rewarded for his greater consistency as he claimed a 6-3 6-4 6-4 victory over Carsten Ball in the second round of the US Open at Flushing Meadows.

While Djokovic hit only three aces to his opponent’s nine with Ball producing serves of up to 135mph, the Australian foundered after producing seven double faults and making 45 unforced errors.