Kalshi Signs Exclusive US Open Partnership to Expand Sports Prediction Push
Forecast Trend Report by Period
Kalshi has partnered with the United States Tennis Association to become the exclusive prediction-market platform partner of the US Open.
Front Office Sports reported on Aug. 30 that Kalshi signed an official prediction-market platform partnership agreement with the USTA and the US Open. The deal is effective immediately, and financial terms were not disclosed.
The agreement was reached quickly ahead of the tournament's start. The USTA had initially planned to explore a partnership with a prediction-market company after 2027, but Craig Tiley, who became the organization's chief executive officer in July, played a leading role in launching the tie-up for this year's tournament.
The deal also gives Kalshi exclusive advertising rights, Front Office Sports said. The USTA plans to bar other prediction-market platforms from advertising both at US Open venues and during ESPN's tournament broadcasts.
Prediction-market operators, including Kalshi, have been expanding aggressively into sports. Kalshi and Polymarket are both official partners of the National Hockey League, and Kalshi has also struck deals with Major League Baseball teams including the Atlanta Braves, Boston Red Sox, Los Angeles Dodgers, San Diego Padres and San Francisco Giants.
Sports-related contracts have become a key driver of prediction-market trading volume. Data from The Block showed combined volume this month for Kalshi, Polymarket and PolymarketUS reached $41.2 billion, of which Kalshi accounted for $33.7 billion.
Regulatory uncertainty around sports-event contracts remains. Kalshi is in legal disputes with regulators in several states over whether state gambling laws can be applied to sports-event contracts overseen by the Commodity Futures Trading Commission.
Most recently, the Ninth U.S. Circuit Court of Appeals ruled in litigation involving Nevada that Kalshi had not sufficiently demonstrated that federal commodities law preempts the state's gambling regulations on sports-event contracts. That outcome diverged from an earlier ruling by the Third U.S. Circuit Court of Appeals that blocked New Jersey from regulating Kalshi's sports contracts, extending the fight over federal and state authority over prediction markets.
