World tennis number one Novak Djokovic is the first man through to the quarter-finals of the US Open, sweeping past Germany's Philipp Kohlschreiber 6-1 7-5 6-4.
The Serbian tennis player Novak Djokovic wins a match at the 2014 US Open. Photo: PHOTOSPORT
Djokovic, who has reached the final at Flushing Meadows each of the last four years and won it all in 2011, has been in storming form, giving every indication that the big Serb plans to be playing for the title again at the weekend.
The top seed needed just 19 minutes to race in front 5-0 lead before the 22nd seeded Kohlschreiber finally held serve to halt the slide.
But the small victory could not stop the inevitable as Djokovic wrapped the first set and then when on to claim the match in a touch over two hours without surrendering a break.
Djokovic, who has advanced to the last eight without dropping a set, will now meet eighth seed Andy Murray of Scotland who scored a straight sets win over ninth seed Jo-Wilfried Tsonga of France.
Two-times defending champion Serena Williams rode her big serve to a 6-3 6-3 victory over Kaia Kanepi of Estonia to advance to the quarter-finals.
American tennis player Serena Williams Photo: PHOTOSPORT
Williams won every one of her first serve points in the opening set, including six aces, as she pounded in 63 percent of them and never faced break point in the set.
The second set saw both players struggle on serve, with a total of six breaks registered, as Williams, who belted eight aces, won with her fourth service break in the final game of the 65-minute match between the ferocious hitters.
Williams hopes to make up for a disappointing grand slam season in which she failed to advance past the fourth round in any of the previous majors.
Williams will meet Italian 11th seed Flavia Pennetta, a semi-finalist last year who advanced with a 7-5 6-2 win against 29th-seeded Australian Casey Dellacqua.
And New Zealand's Michael Venus has been beaten in the third round of the men's doubles.
Venus and partner Mikhail Kukushkin of Kazakhstan lost to the second seeds Alexander Peya of Austria and Bruno Soares of Brazil in straight sets, 6-3 6-4.
The New Zealand tennis player Michael Venus Photo: PHOTOSPORT
The Australian Open champion Stan Wawrinka survived two set points to eventually advance to quarterfinals.
The third seeded Swiss beat Spain's Tommy Robredo 7-5 4-6 7-6 6-2.
After splitting the first two sets, the third-seeded Swiss trailed 6-4 in the third-set tiebreaker but battled back to win 9-7 and closed out the victory over the Spanish 16th seed in the fourth set.
Wawrinka will play either big-serving Canadian Milos Raonic, the fifth seed, or 10th-seeded Kei Nishikori of Japan in the last eight.
