Botic van de Zandschulp vs Jan Choinski Prediction, Odds & Best Bet - September 2, 2026

Jan Choinski moneyline +320 is the model pick, although the margin supporting it is extremely narrow. Choinski has a projected win probability of 24%, compared with the 23.8% break-even rate at +320. That leaves an edge of 0.2%, expected value per unit of 0.009 and a Low confidence rating.

The player profiles make the upset price worth considering. Choinski is ranked 76 with 773 ranking points, while Botic van de Zandschulp is ranked 70 with 868 ranking points. Those figures support Van de Zandschulp’s status as the favorite, but the projection gives Choinski just enough win probability to clear the quoted moneyline threshold.

This is a price-sensitive upset pick rather than a claim that Choinski is the stronger player. He must hold serve often enough to remain competitive, create return pressure and convert the break points that can decide close sets. With such a small projected edge, bettors should treat Choinski +320 as the specific play rather than backing him at a materially shorter price.

Botic van de Zandschulp enters this US Open Round 1 match as the higher-ranked player. The 30-year-old from the Netherlands is ranked 70 with 868 ranking points. He is right-handed, listed at 6' 3" and 187 lbs, and is in his 10th Season.

Those profile advantages explain why the market makes Van de Zandschulp the favorite against Jan Choinski. However, this wager is not based on disputing that favoritism. The betting question is whether Choinski’s chance of winning exceeds the 23.8% break-even rate attached to his +320 moneyline, and the projection answers narrowly in the affirmative at 24%.

Van de Zandschulp’s clearest match path is to protect his serve while creating consistent pressure on Choinski’s service games. Early breaks would make it harder for the underdog to keep sets close and would reduce the number of high-leverage return opportunities available to Choinski. Van de Zandschulp remains the more likely winner, which is why the Choinski selection carries Low confidence despite clearing the model threshold.

Jan Choinski is 30, right-handed and listed at 6' 5" and 194 lbs. The Great Britain player is ranked 76 with 773 ranking points and is in his 14th Season. Botic van de Zandschulp holds the better ranking and ranking-points position, but the two players remain relatively close in the listed rankings.

Choinski’s upset route begins with stable service games. His height is part of his physical profile, but it does not by itself establish a serving advantage. He still must execute: holding serve can keep sets within reach, limit scoreboard pressure and create the possibility that a small number of points determine the outcome.

Close sets alone will not cash the moneyline. Choinski also needs to apply return pressure, earn break points and convert enough of those chances to win the match outright. His projected win probability is only 24%, so an upset is clearly required. The case for Choinski +320 is that this projection sits slightly above the price’s 23.8% break-even rate, not that his player profile makes him the expected winner.

The decisive matchup is Choinski’s serve against Van de Zandschulp’s return pressure. Choinski does not need to control every return game, but he does need enough reliable service holds to prevent the favorite from building routine separation. If he can keep sets close, individual break points become more influential.

Repeatedly difficult service games would work against the underdog. Van de Zandschulp is ranked 70 with 868 ranking points, compared with Choinski at 76 with 773 ranking points, and sustained return pressure would give the higher-ranked player opportunities to turn that advantage into breaks of serve. Falling behind would also force Choinski to take greater risks on return.

The favorable script for Choinski +320 features regular holds, limited break opportunities and efficient execution on the most important points. Choinski’s 6' 5" listing does not guarantee that outcome, but holding serve is essential to his upset path. He must eventually generate breaks of his own, because extending sets without taking Van de Zandschulp’s serve would not be enough to secure the outright match win required by the moneyline.

The market price under review is Jan Choinski +320, which carries a 23.8% break-even rate. Kingpin projects Choinski to win 24% of the time, producing an edge of 0.2% and expected value per unit of 0.009. The Kingpin edge score is 50.91, while confidence is Low.

This is a narrow disagreement with the moneyline rather than a prediction that Choinski should be favored. Van de Zandschulp is ranked 70 with 868 ranking points, while Choinski is ranked 76 with 773 ranking points. The profiles support Van de Zandschulp as the more likely winner, but the projection gives Choinski marginally more upset probability than +320 requires.

Price discipline is therefore central to the bet. A small move can erase an edge of only 0.2%, so the recommendation should not be extended automatically to a materially shorter Choinski moneyline. At the observed +320 price, the official selection remains Jan Choinski moneyline, but the Low confidence designation accurately reflects how little separates the projection from the market threshold.

The first trigger is a change in price. Jan Choinski +320 has a 23.8% break-even rate, only 0.2% below his projected win probability of 24%. A materially shorter moneyline could remove that narrow edge and require a new evaluation rather than continued support for the selection.

A credible retirement concern involving either player would also matter. The same applies to a schedule delay or a surface change, because any alteration to match conditions could affect the assumptions behind Choinski’s service-hold and return paths. With expected value per unit listed at only 0.009, the pick has little room to absorb new uncertainty.

The final concern is the on-court matchup. The Choinski case depends on stable service games and enough return success to create decisive break points. Stronger reason to expect Van de Zandschulp to generate consistent break pressure would weaken that route considerably. If Choinski cannot protect serve or threaten on return, his +320 moneyline should be passed despite the current 24% projection.