• No good reason for inaction by grand slams, Sinner says

• Players want contributions towards welfare benefits

Jannik Sinner has criticised the grand slam tournaments for failing to engage with repeated requests from the world’s top stars to discuss prize money and welfare benefits for lower-ranked players.

The Guardian has learned that detailed proposals from the world’s top 10 male and female players over alterations to prize money were rejected by the grand slam tournaments in August, while their request for a meeting to discuss their concerns at the US Open was also turned down.

• WSL board examining ways of raising funds

• Loans would be used to boost payments and prize money

The Women’s Super League is exploring borrowing tens of millions of pounds in an attempt to accelerate the growth of the competition. The WSL board has commissioned the investment bank Goldman Sachs and the accountancy firm Deloitte to examine ways of raising funding anda debt deal is the preferred option at this stage.

The borrowing would be used to increase central payments and prize money awarded to clubs, with the aim of stimulating further growth in sponsorship, broadcast deals and club-led investment, as a result of creating a better product.