Roger Federer and Rafael Nadal through to US Open fourth round after contrasting wins

Roger Federer got his US Open campaign back on track but there was another battle for Rafael Nadal as they edged closer to a semi-final meeting.

After being taken to five sets in his opening two matches, Federer only needed an hour and 46 minutes to dismiss Feliciano Lopez 6-3 6-3 7-5.