• World No 1 makes ‘difficult decision’ to miss slam

• Draper still recovering from bone bruise in left arm

Jannik Sinner will miss the US Open with a right knee injury. The world No 1 has not played a match since beating Alexander Zverev last month to successfully defend his Wimbledon title, missing the Masters 1000 events in Canada and Cincinnati. Great Britain’s Jack Draper is also out of the event.

The news comes a day after his great rival Carlos Alcaraz, whom the Italian lost to in the final in New York 12 months ago, revealed he will make his comeback at Flushing Meadows after four months out with a wrist injury.

With one semi-final in her last seven tournaments, the coming months will define the next stage of her career

Towards the end of a messy first set tie-break late on Wednesday, Aryna Sabalenka wildly sprayed another painfully nervous backhand before slamming her racket to the ground. As the racket connected with the acrylic floor, its vibration dampener detached from the strings and rolled off in the direction of the broadcast camera pit by the side of the court.

With the diminutive 20-year‑old Czech player Sara Bejlek leading Sabalenka 6-5 in the tie-break, this slapstick sequence forced play to pause while the Belarusian and a couple of volunteers comically searched for the missing vibration damper underneath the cameras until she gave up and retrieved a new one. A few minutes later, Sabalenka trailed by a set.

• Total prize pool for tournament will be $108m

• Players guaranteed $140,000 for making first round

The world’s leading tennis players have welcomed the US Open’s announcement of a 20% increase in prize money and agreed not to continue their protests at this year’s tournament as a result.

The build up to both the French Open and Wimbledon was overshadowed earlier this year by a media boycott as the players continue to demand a greater share of tournament revenues, but after the US Tennis Association announced a record prize pot of $108m there will be no such disruption at Flushing Meadow.