Marta Kostyuk vs. Sloane Stephens prediction, odds, picks for US Open 2026

Marta Kostyuk will face Sloane Stephens in the second round of the US Open Women's Singles 2026 on Wednesday.

Dimers' proven tennis model projects Marta Kostyuk as the most likely winner in this Kostyuk vs. Stephens prediction.

This article offers an expanded analysis of Wednesday's match, including best bets and picks.

Kostyuk vs. Stephens prediction and odds

Using powerful machine learning and statistical analysis, we have simulated the outcome of Wednesday's Kostyuk-Stephens women's singles match, forming part of our tennis predictions coverage.

Our leading predictive model gives Kostyuk an 85% chance of winning against Stephens in the US Open 2026.

Latest betting odds

We have sourced the most up-to-date betting odds in America for this match, which are listed here:

• Moneyline: Sloane Stephens +550, Marta Kostyuk -781

All odds are correct at the time of publication and are subject to change.

Model picks and best bet

After matching our predictions against the best available odds, we can reveal our picks for each of the major markets in this matchup. Plus, find our best bet for the game below:

• Moneyline: Stephens @ +550 via DraftKings
• First Set: Stephens @ -149 via DraftKings

According to our best tennis bets, the top play to make on this match is over 18.5 total games.

These picks are based on our probabilities matched against the implied probabilities from the current available odds.

Game info & first serve details

The US Open 2026 match between Marta Kostyuk and Sloane Stephens is scheduled to commence on Wednesday at 12:40 PM ET.

• Who: Marta Kostyuk vs. Sloane Stephens
• Date: Wednesday, September 2, 2026
• Approx. Time: 12:40 PM ET/9:40AM PT
• Tournament: US Open Women's Singles 2026
• Round: Second round

All dates and times mentioned in this article are United States Eastern Time unless otherwise noted.

Conclusion

We predict Marta Kostyuk, with an 85% win probability, will likely beat Sloane Stephens at the US Open 2026.

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