The 2026 US Open Tennis Championships will take place from Sunday, August 23, to Sunday, September 13, 2026, at the USTA Billie Jean King National Tennis Center in Flushing, New York. We are still months away from the final Grand Slam of the year; however, the “US Open Men’s Singles Winner’’ contract at Kalshi is already driving significant trading volumes as tennis superstars move up and down the board.
There is a clear favorite, but as the last edition of Roland Garros has taught the world, an injury or unexpected weather can drastically impact the outcome of a major tournament.
Sinner at the top: Alcaraz, Novak and Zverev follow
Because the US Open is a single-elimination tournament, the market behaves as a mutually exclusive asset ladder. Only one player’s contract can resolve to Yes, which opens a lot of room for speculation and strategy.
Right now, world No. 1 Jannik Sinner is positioned as the traders' favorite, commanding an increasingly high implied probability of taking home the trophy. Traders backing the Italian are trusting his impressive history in New York. In the 2024 edition, he became the first Italian men’s singles champion, followed by a grueling defeat against Carlos Alcaraz in the 2025 Finals.
The Spanish player, currently the world No. 2, appears as the main runner-up, just a few steps behind Sinner. Alcaraz is a competitive beast who has already lifted the trophy in Flushing Meadows. That is why traders believe he can repeat that magnificent achievement in this edition of the US Open.
However, the contrarian thesis against the Spanish relies mainly on his surprising withdrawal from Wimbledon due to a lingering right wrist injury. His medical team claims that the decision was made to give the player more time to recover, not because he is currently experiencing intense pain. The issue—diagnosed as tenosynovitis (inflammation of the tendon sheath)—flared up at the Barcelona Open in mid-April and previously forced him to miss the French Open.
Coming in at the third and fourth place on the trading board, with nearly identical implied probabilities, appear the perennial legend Novak Djokovic and the world No. 3 Alexander Zverev enters the hardcourt swing fresh off winning Roland Garros, seizing a massive opportunity earlier this season following the physical setbacks of both Sinner and Alcaraz.
The Underpriced Contender
Right now, Alexander Zverev seems to be severely underpriced by the market. His Yes shares are selling at a discount, opening a highly attractive window for traders who want to speculate on a deep tournament run by the German star.
Depending on the upcoming draw, Zverev possesses the baseline efficiency to reach the semifinals smoothly. In that scenario, his Yes shares would experience a massive surge, driven not only by his on-court performance but also by the sustained narrative momentum of being the reigning French Open champion.
Tournament Draws and Massive Hype
The main draws will be officially revealed on Thursday, August 27, just a few days before main draw matches kick off on Sunday, August 30. That window will see high-velocity trading and massive shifts in market sentiment as traders analyze each contender’s potential path to victory.
At that stage, traders tend to overestimate a favorite's inevitability while failing to map out the mathematical path of other seeds. A profitable strategy consists in identifying elite mid-tier contenders who draw a highly favorable path — specifically avoiding early clashes with Jannik Sinner or Carlos Alcaraz until the semifinals.
Remember, you do not have to hold those Yes shares until the final settlement in September. You can buy the discount early, ride the progressive hype wave as the underdog advances through the first week, and cash in on those appreciated contracts right before they encounter the main favorites.
