Djokovic survives 'toughest' match ever to stay on course for a place in tennis history

Novak Djokovic saw his U.S. Open hopes nearly sunk by a fellow Serb while defending women's champion Iga Swiatek sailed into the fourth round of the year's final Grand Slam as an American wave swept across Flushing Meadows.

On the ropes and reeling after dropping the opening two sets of his match to compatriot Laslo Djere, a tenacious Djokovic lifted himself up off the floor, as he has done so many times before, to claim a 4-6 4-6 6-1 6-1 6-3 win.

It marked the 38th time Djokovic has won a five-setter and kept alive the 36-year-old's quest for a fourth U.S. Open crown that would pull him level with Margaret Court's record haul of 24 Grand Slams.

"I hope you enjoyed the show, it was not so enjoyable for me especially in the first two sets," Djokovic told the crowd.

"It was one of the toughest matches I have played here in many years."

While Djokovic needed almost four hours to get the job done, Swiatek needed only 49 minutes to book her spot.

The Pole showed her best friend on Tour Kaja Juvan no mercy, thrashing the Slovenian qualifier 6-0 6-1.

Americans Taylor Fritz, Frances Tiafoe, Tommy Paul and Ben Shelton all moved safely through to the last 16, raising hopes of a first homegrown men's champion in two decades.

It has been 78 Grand Slams since Andy Roddick won the 2003 U.S. Open and there is growing belief that the talent is there to end the drought of American champions.

Ninth seed Fritz is seen as the main U.S. contender for the title and he blasted his way into the fourth round with a 6-1 6-2 6-0 demolition of 18-year-old Czech qualifier Jakub Mensik.

Tiafoe, who electrified the tournament with his run to the semi-finals last year, is once again exciting the home crowd, advancing with a 4-6 6-2 6-3 7-6(6) victory over crafty French veteran Adrian Mannarino.

Fourteenth seed Paul overcame a third-set hiccup to dispatch Spaniard Alejandro Davidovich Fokina 6-1 6-0 3-6 6-3 and will next face 20-year-old compatriot Shelton, a 6-4 3-6 6-2 6-0 winner over Aslan Karatsev.

"Tremendous," said Tiafoe, summing up the U.S. results so far. "We're going to continue to do so.

"This is a group that had a lot of ability. Always had a lot of talent.

"You look at a guy, Tommy Paul, took him a while to get going. He believes more than anybody right now.

"Taylor obviously has been playing well for a while. Myself.

"Ben, he's had an up-and-down year, but now he's playing great tennis.

But 28-year-old Brady, just four tournaments into her comeback, and Wozniacki, playing in her third, looked as if they had never been away by treating fans to some quality tennis that at times had the crowd on their feet.