Daniel Evans rallied from 0-4 down in the final set to beat Karen Khachanov in the longest match in US Open history on Tuesday, a five-hour, 35-minute epic on court six.

Midnight matches may be popular with fans but not with old campaigner Novak Djokovic, who bemoaned a late night at the start of his U.S. Open title defence on Monday.

Djokovic, speaking to reporters as he prepared to defend his US Open title, said players who have bemoaned a lack of transparency in the Sinner case make a valid point.

World number one Jannik Sinner is "honest to the core" and is an "innocent victim" his coach Darren Cahill said after the Italian was cleared of any wrongdoing despite twice testing positive for a banned substance.

"Hi all, writing today to let you guys know that I have decided not to compete at this year's US Open, a place where I have amazing memories," Nadal posted. "I will miss those electric and special night sessions in NYC at Ashe.

The 38-year-old Spanish left-hander has a protected ranking of ninth to put himself into the field for the Flushing Meadows fortnight, which begins on August 26.

Rory McIlroy broke his silence about his devastating U.S. Open loss on Monday, saying he would take a few weeks away from the game to "process everything."

Patience is a virtue that Sinner does possess, and eventually that paid off.

Novak Djokovic, who won his 24th Grand Slam title on Sunday, will dominate men's tennis for years because younger players have yet to reach his level, according to Andy Murray.

"I thought about doing this t-shirt a few days ago," said Djokovic. "I didn't share it with anybody. Kobe was a close friend of mine, we chatted a lot, about the winner's mentality."

The 36-year-old Serb becomes the oldest U.S. Open men’s winner in the Open Era and the first to win three Grand Slam events in a season for the fourth time.

Gauff, 19, produced a gutsy performance on the Arthur Ashe Stadium court to win 2-6, 6-3, 6-2 in 2hr 6min to complete a fairytale transformation in her season's fortunes.

Novak Djokovic earned himself another shot at a record-equalling 24th Grand Slam title after beating unseeded American Ben Shelton in straight sets on Friday to advance to his 10th US Open final.

Daniil Medvedev upset defending champion Carlos Alcaraz in an enthralling semi-final duel to reach the US Open final on Friday.

Aryna Sabalenka fought back from the brink of defeat to overcome American 17th seed Madison Keys in a third-set tie-break and line up a US Open final against home favourite Coco Gauff.

The US Open was plunged into chaos on Thursday after environmental activists disrupted play, forcing a 49-minute stoppage as the tennis showpiece became the latest high-profile sporting event to be targeted by protesters.

American teenager Coco Gauff shrugged off a 50-minute stoppage caused by climate protesters to power into the US Open final on Thursday with a straight sets defeat of Karolina Muchova.

Defending champion Alcaraz moved to within one win of a potential dream final with Novak Djokovic with an emphatic straight sets victory over German 12th Alexander Zverev.

New York has been sweltering in a heatwave this week, with high humidity and temperatures at Flushing Meadows on Wednesday hitting 35 degrees Celsius (95 Fahrenheit)

Djokovic shrugged off ninth seed Fritz 6-1, 6-4, 6-4 to extend his dominance of American players in New York and take another step closer to a record-extending 24th men's Grand Slam title.