Kalshi becomes exclusive US open prediction market partner
Kalshi has secured an exclusive partnership with the U.S. Tennis Association to become the US Open’s prediction market platform partner, with the agreement taking effect during the 2026 tournament.
Type: Distribution — prediction market partnership
Sport: Tennis / US Open
Announced: August 2026
- Kalshi has become the US Open’s prediction market platform partner in an exclusive agreement with the U.S. Tennis Association (USTA). The deal was finalized after the tournament’s qualifying rounds and took effect immediately, although financial terms and other commercial parameters were not disclosed.
- The agreement gives Kalshi an official role at one of tennis’s four Grand Slam tournaments and restricts competing prediction market platforms from advertising at the US Open venue and across tournament television coverage, according to Front Office Sports reporting cited in the source material.
- The partnership arrives as Kalshi expands its sports business, with the platform already offering contracts tied to US Open matches. Its tennis markets included individual men’s and women’s singles matches, with some contracts recording more than $1 million in trading volume.
- The US Open had previously considered waiting until 2027 or later before entering a prediction market partnership, according to Front Office Sports. Discussions had involved multiple prediction market platforms and included considerations around match integrity and potential partnerships.
- Craig Tiley, who became USTA CEO on July 20, played a major role in pushing for an agreement covering the 2026 tournament, according to the report. The partnership had not yet been fully reflected across the organizations’ public materials when the main draw began.
- Kalshi’s US Open deal adds another major sports property to its growing partnership portfolio. The company has also announced relationships with MLB clubs, the NHL and other sports properties, while prediction market rival Polymarket has partnered with Major League Baseball and the New York Yankees.
- The partnership comes amid ongoing legal disputes over prediction market sports contracts. Kalshi is challenging state regulators who argue that its sports event contracts constitute sports betting, while Kalshi maintains that its federal regulatory status allows it to offer the contracts under the Commodity Exchange Act.
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