Djokovic cruises past Querrey

Novak Djokovic continued to look the man to beat at the US Open as he cruised into the fourth round with a comfortable victory over American Sam Querrey.

Novak Djokovic eased through to the fourth round (AP)
Novak Djokovic eased through to the fourth round (AP)

Djokovic has not been tested in any of his matches so far and needed just an hour and 25 minutes to dispatch Querrey 6-3 6-2 6-2.

Querrey's serve is his biggest asset but Djokovic was all over it, the American winning just 23 per cent of points on his second serve and only 57 per cent on his first.

Coming into the tournament, Djokovic admitted he did not not know how being away from his pregnant wife would affect him but any rivals looking for a lack of focus will have been sorely disappointed.

Fifth seed Milos Raonic ended the run of Victor Estrella Burgos in a tight match that was decided by three tie-breaks.

Estrella Burgos' rise into the top 100 at the age of 34 has been one of the best stories of the season but even his enthusiastic band of fans from the Dominican Republic could not propel him to victory this time.

In the fourth round Raonic will play 10th seed Kei Nishikori, who came into the tournament short on matches because of injury but has been impressive and beat Leonardo Mayer 6-4 6-2 6-3.