Djokovic cruises through
Novak Djokovic continued to look the man to beat at the US Open as he cruised into the fourth round.
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Djokovic has not been tested in any of his matches so far and needed just an hour and 25 minutes to dispatch American Sam 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.
The Serbian struggled badly in the warm-up tournaments in Toronto and Cincinnati but is feeling mentally refreshed in New York after a draining summer that included winning Wimbledon and getting married.
"It was just overwhelming moments," he said. "Going back to the clay-court season, I had an injury with the wrist that I didn't know how long it's going to stay there, if it's going to be an obstacle for me to play (the French Open), and that took a lot of energy from me emotionally.
"Then Roland Garros, losing another final against (Rafael) Nadal and then bouncing back and winning Wimbledon the way I wanted and becoming number one and then a few days later a wedding.
"So these things together are very overwhelming in every way. Of course, it gave me a lot of positive energy, but it was very demanding.
"I tried to enjoy that and worked pretty well before the lead-up tournaments to the US Open. I was physically ready, but obviously emotionally I was still not out there.
"My game is peaking at the right time, at the right tournament. This is where I want to play my best tennis."
Djokovic next meets German 22nd seed Philipp Kohlschreiber, who defeated John Isner in the third round for a third straight year.
Kohlschreiber's 7-6 (7/4) 4-6 7-6 (7/2) 7-6 (7/4) victory means for the second successive year there are no American men in the fourth round, with only Serena Williams left in the women's tournament.
Third seed Stan Wawrinka did not even have to take to the court against Blaz Kavcic, the Slovenian pulling out of their clash before the start with a foot injury.
Wawrinka will hope it is a good omen because he was also given a walkover in the third round of the Australian Open, which he went on to win.
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.
"For me it was the best week," said Estrella Burgos. "I lost today, but today was my best match. I played at a very good level.
"The three sets were very close. I was serving for the set in the third set. I could not close the set but I'm not too sad."
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.
Ninth seed Jo-Wilfried Tsonga is through to the fourth round without dropping a set after a 6-4 6-4 6-4 win over Spain's Pablo Carreno Busta.
Tommy Robredo ended the run of 19-year-old Nick Kyrgios with a masterclass of experience versus youth.
Australian Kyrgios is made for a stage like Arthur Ashe under the lights and powered his way into a 5-0 lead.
But Robredo is one of the canniest players around and he worked away at Kyrgios' raw edges to turn the match in his favour and win 3-6 6-3 7-6 (7/4) 6-3.
Robredo beat Roger Federer in the fourth round last year and will attempt to upset another Swiss, Wawrinka, in the last 16 this time.