Marta Kostyuk vs. Iga Swiatek prediction, odds, picks for French Open 2026

Marta Kostyuk will take on Iga Swiatek in the fourth round of the French Open Women's Singles 2026 on Sunday.

Based on the latest simulation results, Dimers' advanced tennis model predicts Iga Swiatek as the most likely winner of the Kostyuk vs. Swiatek match.

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

Kostyuk vs. Swiatek prediction: Who will win and advance to the quarterfinals?

Using innovative machine learning and data, we have simulated the outcome of Sunday's Kostyuk-Swiatek women's singles match, forming part of our tennis predictions coverage.

Our famous predictive model gives Swiatek a 70% chance of defeating Kostyuk in the French Open 2026.

Additionally, Swiatek has a 66% chance of winning the first set. The simulations also show Kostyuk (+4.5) has a 53% chance of covering the games spread, while the **over/under of 20.5 games has an equal 50-50 chance of hitting, according to our model.

Marta Kostyuk vs. Iga Swiatek odds

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

Bet Type	Kostyuk	Swiatek
Moneyline	+220	-272
First Set	+175	-227
Game Spread	+4.5 (-120)	-4.5 (-110)
Total Games	o20.5 (-118)	u20.5 (-112)

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

Kostyuk vs. Swiatek picks and best bet

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

Bet Type	Pick	Bet Now
Moneyline	Kostyuk	+220
First Set	Swiatek	-112

According to our tennis best bets, the top play to make on this match is Marta Kostyuk to win.

Although Kostyuk is less than likely to win, she provides the best value at the current available odds.

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

Kostyuk vs. Swiatek updates and essential details

The French Open 2026 match between Marta Kostyuk and Iga Swiatek is scheduled to begin on Sunday at 5:00 AM ET.

• Who: Marta Kostyuk vs. Iga Swiatek
• Date: Sunday, May 31, 2026
• Approx. Time: 5:00 AM ET/2:00AM PT
• Tournament: French Open Women's Singles 2026
• Round: Fourth round

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

Conclusion

We predict Iga Swiatek, with a 70% win probability, will likely beat Marta Kostyuk at the French Open 2026.

Additional tools and information for betting safely can be found in our Responsible Gambling hub.