Kalshi Partners with USTA as Official Prediction Market Provider for US Open
TL;DR — Kalshi secured a multi-year deal as Official Prediction Market Partner of the US Open starting with the 2026 tournament. The pact includes visibility rights, a 25-fold rise in tennis volume, and strict limits on umpire and violation markets plus ITIA data sharing for surveillance. It reflects sports’ 80% share of Kalshi’s activity amid $178 billion total volume.
SCCG Take — This model embeds integrity controls from the outset, setting expectations for how prediction platforms must align with governing bodies before scaling live sports exposure.
Kalshi has entered a multi-year partnership with the United States Tennis Association to become the Official Prediction Market Partner of the US Open. The agreement launches with the 2026 US Open Singles Main Draw, granting visibility across digital platforms and on-court signage. Tennis trading volume on the platform has increased 25-fold year over year, with the overall user base now reaching millions.
The deal includes explicit restrictions on markets tied to umpire decisions and code violations to protect competitive fairness. Kalshi has also signed a confidential data-sharing agreement with the International Tennis Integrity Agency to enable real-time market surveillance during the tournament. The US Open, which began on August 31 and runs through September 13, draws 1.14 million fans and features a prize pool exceeding $100 million.
Kalshi’s Expansion Across Tennis and Major Sports
The USTA partnership builds on Kalshi’s recent agreement with Catalist Sports for livestreams and data from more than 65,000 tennis matches. Sports now account for 80% of Kalshi’s trading volume following its expansion into NFL, NBA and MLB event contracts in early 2025. The platform maintains additional multi-year marketing deals with teams including the Atlanta Braves, Boston Red Sox, Los Angeles Dodgers, San Diego Padres and San Francisco Giants, as well as NHL and soccer league agreements. Overall trading volume has surpassed $178 billion since the platform launched ahead of the 2024 presidential election, according to reporting by World Casino News.
Kalshi co-founder and CEO Tarek Mansour said in a press release: “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. We’re proud to partner with the USTA to give fans even more ways to engage with the game they love.”
Integrity Framework Shapes the Partnership Terms
USTA CEO Craig Tiley said: “We’re relentless about keeping tennis at the cutting edge of global sports innovation and fan connection. Partnering with Kalshi gives us an opportunity to pioneer that next generation of fan engagement while ensuring the integrity of our sport.” The USTA and Kalshi elected to restrict specific event contracts rather than pursue an unrestricted commercial arrangement. The accompanying ITIA data-sharing pact and proactive monitoring measures address risks that prediction markets could influence competitive outcomes.
This structure signals that prediction market operators entering major sports properties must prioritize defined boundaries on tradable events to maintain stakeholder confidence.
Reporting: World Casino News
Generated by SCCG’s automated editorial system from published source reporting. SCCG Management holds editorial responsibility.
Sports leagues will only embrace prediction markets that build surveillance and content controls into the commercial structure from day one.
We have watched prediction platforms chase legitimacy for years. This deal shows the blueprint: data-sharing with integrity bodies, explicit market restrictions, and brand integration tied to transparency. Kalshi moved from election novelty to $178 billion in volume by securing league deals that regulators and governing bodies can defend publicly.
- 25x tennis volume growth, sports now 80% of Kalshi activity
- Partnership bans umpire and violation markets, shares data with ITIA
- Deal follows MLB, NBA, NFL and NHL pacts; model is repeatable
SCCG angle: SCCG connects emerging prediction platforms with sports property decision-makers and integrity vendors across our 545-partner network. We have brokered introductions between fintech, data and content providers in regulated markets; this partnership model requires the same coordinated trust-building we facilitate daily between platforms, leagues and surveillance firms.
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