Kalshi has signed an exclusive deal with the U.S. Tennis Association to become the official prediction-market partner of the U.S. Open, according to Front Office Sports. The agreement took effect immediately, though it was only finalized after last week's qualifying rounds; financial terms were not disclosed. Kalshi has not yet appeared on the tournament's official partner list, and a blog post it published earlier analyzing the women's singles draw carried a disclaimer that the company was "not affiliated with the US Open or the WTA." Sources said USTA is preventing other prediction platforms from advertising at the venue and during television broadcasts, including ESPN's coverage — an unusual element of the deal. Kalshi declined to comment, while USTA and ESPN representatives did not immediately respond. The U.S. Open is owned and operated by USTA; CEO Craig Tiley, who took office on July 20 this year, played a key role in finalizing the agreement. Kalshi and Polymarket are both official NHL partners, and Kalshi has recently partnered with multiple MLB teams. According to The Block, combined trading volume across Kalshi, Polymarket and Polymarket US has reached $41.2 billion since August, with Kalshi accounting for $33.7 billion.
Kalshi has signed an exclusive agreement with the U.S. Tennis Association to become the official prediction-market partner of the U.S. Open, according to Front Office Sports.
The deal took effect immediately, though it was only finalized after last week's qualifying rounds. Financial terms were not disclosed.
Kalshi does not yet appear on the tournament's official partner list. Earlier, the company published a blog post analyzing the women's singles draw that included a disclaimer saying it was "not affiliated with the US Open or the WTA."
As part of the agreement, USTA is blocking other prediction-market platforms from advertising at the event venue and during television broadcasts, including ESPN's coverage, sources said. That makes the arrangement unusual. Kalshi declined to comment, and representatives for USTA and ESPN did not immediately respond.
The U.S. Open is owned and operated by USTA. CEO Craig Tiley, who took office on July 20 this year, played a central role in getting this year's deal done. Kalshi and Polymarket are both official partners of the NHL, and Kalshi has recently agreed to partnerships with multiple MLB teams.
According to The Block, combined trading volume across Kalshi, Polymarket and Polymarket US has reached $41.2 billion since August. Kalshi alone accounts for $33.7 billion of that total.
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