The USTA and Kalshi announced a groundbreaking partnership, making Kalshi the first Official Prediction Market Partner of the US Open.

The exclusive, multi-year agreement begins with the 2026 US Open Singles Main Draw. Through this landmark partnership, Kalshi will have a presence throughout the 2026 US Open across US Open digital platforms and on-court signage.

“We’re relentless about keeping tennis at the cutting edge of global sports innovation and fan connection,” said USTA CEO Craig Tiley. “Partnering with Kalshi gives us an opportunity to pioneer that next generation of fan engagement while ensuring the integrity of our sport.”

The partnership comes amid the rapid growth of prediction market agreements across tennis and professional sports. Kalshi has millions of users, and tennis-related trading volume on the platform is up 25x YoY.

“Every summer the US Open takes over New York, and as a New York company, we’re proud to be part of it. Tennis is one of the fastest-growing sports on Kalshi, with fans using our markets to understand what’s happening throughout the tournament,” said Kalshi co-founder and CEO Tarek Mansour. “We’re proud to partner with the USTA to give fans even more ways to engage with the game they love. That’s the standard for how leagues and prediction markets should partner.”