Carlos Alcaraz and Novak Djokovic edged closer to a semifinal showdown at the US Open on Friday as Aryna Sabalenka avenged the memory of a bitter defeat to power into the last 16.

Ninth seed Elena Rybakina produced a ruthless display to end Emma Raducanu's run at the U.S. Open, advancing to the fourth round for the first time with a 6-1 6-2 victory on Friday.

Seven-time Olympic gold medallist Biles was among the crowd at the Arthur Ashe Stadium as third seed Gauff suffered an error-strewn public unravelling that left her sobbing into her towel at one point in a calamitous first set.

Sinner has reached the final of all three Grand Slams this season.

Iga Swiatek scrapped her way into the third round of the US Open on Thursday with a three-set win over Suzan Lamens as Jannik Sinner sought to keep his title defence on track.

Daniil Medvedev has been fined $42,500 following his meltdown during Sunday's stormy first round defeat to France's Benjamin Bonzi, tournament organisers confirmed.

Carlos Alcaraz stormed into the third round of the US Open with a blistering straight-sets victory on Wednesday as Novak Djokovic overcame an early scare to advance.

Novak Djokovic battled past American qualifier Zachary Svajda in four sets on Wednesday to reach the US Open third round for a record-equalling 19th time.

Gauff, the reigning French Open champion, had prepared for the US Open by shaking up her coaching team on the eve of the tournament in an effort to fix her shaky service game, replacing coach Matt Daly with Gavin MacMillan, a biomechanics specialist.

Avowed Taylor Swift super-fan Iga Swiatek romped through her US Open first-round assignment on Tuesday before offering congratulations to the pop star following her engagement to Travis Kelce.

Jannik Sinner launched the defence of his US Open title on Tuesday with a ruthless 6-1, 6-1, 6-2 win over Czech world number 89 Vit Kopriva.

Having ditched his tousled pre-tournament look, the second seed made an impressive start in his quest to secure a second Grand Slam title of the year.

Elite coach Brad Gilbert agreed with Becker's post, highlighting Medvedev's previous episodes of poor behaviour.

Williams only returned to competitive tennis in July following a 16-month absence from the sport.

France's Benjamin Bonzi sent Russian 13th seed Daniil Medvedev crashing out of the US Open early Monday in a stormy late-night thriller that boiled over into chaos following an extraordinary third-set flashpoint.

Novak Djokovic fears his lack of physical conditioning may come back to haunt him as he chases a record 25th Grand Slam singles title at the US Open.

Aryna Sabalenka launched the defence of her US Open crown with a battling victory on Sunday as American men's hopes Taylor Fritz and Blake Shelton advanced safely.

Iga Swiatek insisted Saturday she does not see herself as favorite for the US Open despite an impressive run of recent form that has left her as the player to beat according to oddsmakers.

Carlos Alcaraz is hoping to end Jannik Sinner's dominance of hardcourt Grand Slam events as the two rivals prepare to do battle again at the US Open.

Defending champions Jannik Sinner and Aryna Sabalenka are chasing rare repeat US Open triumphs as the final Grand Slam of the season gets under way in New York on Sunday.