Player representatives have also not seen the figures. However, if you allow for 10% growth to the $559.7m (£410.5m) the US Open generated in revenue in 2024, then prize money of $98.5m would have be in line with player expectations.

The USTA says the financial statement will be published before the start of the main draw.

Chief executive Craig Tiley, who previously headed up Tennis Australia, described the offer as “a significant first step in a multi-year investment in athletes”.

In a BBC interview in March, world number three Jessica Pegula highlighted how last year’s US Open increase was targeted primarily at those who needed it least -the players who made the second week.

This year, however, the percentage increase is highest in the first round, then falls in every subsequent round.

There are also greater rewards for those competing in the mixed doubles event, which takes place during qualifying week.

The winners will still share $1m, but there is more for everyone else who enters, with first-round prize money doubled.

Player representatives had asked each Grand Slam to contribute $4m in benefit payments this year. The USTA is the first to ring-fence this money for the players, but it will come out of the overall prize fund.

The money for the new US Open player support programme will be placed in an independent holding account while the details are worked through.

The Grand Slam Player Council will have input into this. It will launch after the US Open “with a focus on player input into sporting matters at the four Grand Slam tournaments”.

The exact framework is yet to be decided, but players have been invited to apply and told the council will allow them to discuss specific prize money concerns directly with the Grand Slam in question.

Player representatives “welcomed” the various announcements and noted the “substantial increase” in prize money.

“Players look forward to building on today’s positive announcements and ensuring the Council develops into a genuinely representative and effective forum for player consultation, while continuing to work through their representatives on prize money and player welfare,” a statement read.

The US Open begins on Sunday, 30 August.

First Rothesay Test, Headingley (day two of five)

Pakistan 171 all out: Shafique 61; Tongue 5-46, Robinson 5-51

England 366-8: Brook 91, Cox 73, Root 66; Usman 5-92

England are 195 runs ahead

Scorecard

Harry Brook sparkled in the Headingley gloom to build England’s commanding lead over Pakistan on a shortened second day of the first Test.

Brook, overlooked for the Test captaincy, reinforced how important he will be to England’s new era under Joe Root with a superb 91.

The vice-captain was crucially dropped on one and the reprieve allowed him to take England to 366-8, 195 ahead.

A stand of 120 with Dan Lawrence, who marked his recall with 51, came after Root and Jordan Cox both missed out on landmark centuries.

Root looked set to announce the beginning of his second spell as captain with a ton, while Cox was on course for a maiden hundred.

But their third-wicket partnership of 150 was ended when the impressive Cox feathered behind off the left-arm spin of Ali Usman for 73.

Four balls later, Root was left angry with himself by playing across the line to seamer Khurram Shahzad to be lbw for 66.

Nevertheless, Brook ensured England used the play possible on a damp, dank day in Leeds to cement their advantage.

Morning rain delayed the action until 14:45 BST. The clouds and floodlights should have given Pakistan the conditions to get back into the match. Instead, they could be beaten inside three days.