NEW YORK — Today, Kalshi announced a multi-year partnership with the United States Tennis Association, becoming the exclusive Prediction Market Partner of the US Open beginning with the 2026 tournament.
For two weeks every summer, the US Open transforms Flushing Meadows into the center of the sports universe. As a company built in New York, Kalshi is proud to invest in this late-summer NYC tradition, and in the sport whose fans have made tennis one of the fastest-growing markets on the platform.
"Millions of people turn to our markets to understand what's happening in the tournament as it unfolds," said Tarek Mansour, CEO and co-founder of Kalshi. "This partnership will deepen how fans understand tennis through the power of open markets, live price discovery, and the wisdom of crowds. Alongside the USTA, we're also building a comprehensive integrity framework grounded in data-sharing, education, and market surveillance. We're proud to invest in tennis, and in our city's great tradition."
Deeper insight, powered by crowd wisdom
Tennis fans have embraced prediction markets, with trading volume up 25x year over year. The reason for this growth is simple. These markets give fans something traditional statistics and the score alone cannot: a live, continuously updated win probability powered by the wisdom of crowds.
As each point is played, market prices shift in real time, reflecting the collective judgment of thousands of traders. When a player breaks serve in the third set, or when weather delays alter the match's momentum, traders immediately process the new information and adjust the price accordingly.
To start, the company's name and brand will appear on screens and signage throughout the grounds of the US Open. Over the course of the partnership, Kalshi plans to integrate its real-time market data into coverage of the US Open. From match previews and draw breakdowns to round recaps and daily highlights, the goal is to give fans, whether courtside or watching at home, a live read on how the tournament is unfolding.
Built on Integrity
A market only reflects the wisdom of the crowd if everyone can be confident the game itself is fair, which is why integrity isn't a side agreement to this partnership, but the foundation of it.
Central to the partnership is an integrity framework developed jointly with the USTA. This model demonstrates how prediction markets and professional sports can work together responsibly while preserving trust in both the matches and the markets.
Under the framework, Kalshi will not offer markets tied to umpire decisions, injuries or code violations, eliminating any perverse incentives that could compromise the integrity of the sport.
Kalshi has also established a data-sharing agreement with the International Tennis Integrity Agency, an independent body that safeguards professional tennis. Under this agreement, market activity will be visible to the experts in charge of protecting the sport, so that unusual patterns can be quickly identified and addressed.
Kalshi and the USTA will also continue working with the ITIA to develop standards built specifically for prediction markets, rather than adapted from frameworks designed for other industries.
Ultimately, Kalshi is committed to earning the trust of US Open fans, because trust is what makes markets useful.
Giving back to tennis and the fans
The partnership is also designed to bring Kalshi users into the tournament itself, with special access reserved for the Kalshi community throughout the event:
Exclusive experiences for Kalshi users, from behind-the-scenes access and on-court sessions with tennis legends to player opportunities and marquee events across the tournament
Premium hospitality at the biggest sessions of the fortnight, including the semifinals and finals
On-the-ground activations at the Billie Jean King National Tennis Center, where fans on the grounds can engage with Kalshi throughout the tournament
Original content from the grounds, capturing the tournament for fans following along on Kalshi's channels
These experiences will grow in each year of the partnership, with expanded activations and deeper integrations planned for 2027 and beyond.
Investing in New York
Kalshi was built in New York, and the US Open is part of what makes this city so great. This partnership is a long-term investment in the tournament, in the sport and in the city's great traditions, as well as a commitment to being an active part of New York's future.
About Kalshi
Kalshi is the first regulated prediction market in the United States, where people trade on the outcome of real-world events, from economics to elections to sports. For more information, visit kalshi.com.
Media contact: Jack Such, [email protected]
