Tennis stars ask Grand Slams for more prize money

American Emma Navarro said she had put her name to a letter signed by the world’s top tennis players calling for significant improvements in prize money at the four Grand Slams as a way to ensure players receive equal treatment.

French outlet L’Equipe reported that the top 20 ATP and WTA players had sent the letter to the Australian Open, the French Open, Wimbledon and the U.S. Open recently demanding a more equitable distribution of revenue.

While those at top of the game are able to benefit from increased prize money...