~28–30% · $320K liq · Men's singles
Sports Prediction Markets
US Open Tennis 2026 — Prediction Market Winner Odds
Who wins the 2026 US Open? Outright futures for the men’s and women’s singles are live on Polymarket and Kalshi — Alcaraz and Sinner lead the men’s draw, Sabalenka the women’s. Odds reprice after every match once the Slam begins in late August, and the same player often trades points apart across venues. Mantis shows the cross-venue spread in one search.
2026 US Open Winner Odds — All Venues
Cross-venue outright-winner futures as of June 2026. Probabilities reflect Polymarket prices — click any player to compare venues side by side.
~26–28% · $300K liq · Men's singles
Jannik Sinner
~9–10% · $240K liq · Men's singles
Novak Djokovic
~23–25% · $220K liq · Women's singles
Aryna Sabalenka
~18–20% · $200K liq · Women's singles
Iga Świątek
~13–15% · $210K liq · Women's singles
Coco Gauff
Why prediction markets for tennis?
Live repricing every match
Grand Slam odds move after every result — a seeded upset reshapes the whole draw’s pricing in minutes. Unlike sportsbook futures, prediction markets update with no line lag and no built-in margin.
Cross-venue draw arbitrage
The same player’s title contract can trade 2–4 points apart across Polymarket and Kalshi, widening during late-round drama. Mantis flags the best line for each player automatically.
Beyond the title — round & H2H markets
Active tennis markets also cover reach-the-final, set-betting, and head-to-head match outcomes. Search any player or round at mantiss.store to see every active market across venues.
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FAQ
Who are the 2026 US Open favourites on prediction markets?
As of mid-2026, the men’s draw is led by Carlos Alcaraz (~28–30% on Polymarket) and Jannik Sinner (~26–28%), with Novak Djokovic around 9–10%. In the women’s draw, Aryna Sabalenka tops the market near 23–25%, followed by Iga Świątek (~18–20%) and Coco Gauff (~13–15%). Outright-winner futures trade ahead of the tournament (late August–September) and tighten through the draw — and the same player often trades a few points apart across venues.
Where can I trade US Open tennis prediction markets?
Polymarket and Kalshi both list US Open outright-winner futures for the men’s and women’s singles draws. Polymarket carries the deepest liquidity on the top seeds. Mantis aggregates both venues so you always see the cross-venue consensus and can route to the sharpest odds with referral codes intact.
How do tennis prediction market odds move during a Grand Slam?
Tennis markets are highly dynamic during a Slam — odds reprice after every match, upset, and retirement. A top seed losing early can swing the whole field’s prices within minutes, and cross-venue spreads widen during late-round drama as platforms reprice at different speeds. Mantis surfaces those gaps in real time.
Are there prediction markets for the other 2026 tennis Grand Slams?
Yes. Polymarket and Kalshi carry outright-winner markets for all four majors — the Australian Open, French Open, Wimbledon, and US Open — plus year-end No. 1 and head-to-head markets. Search any player or tournament at mantiss.store to compare every active market across venues.