Katie Boulter vs. Antonia Ruzic prediction, odds, picks for WTA Japan Open 2026

Using trusted machine learning and data, we have re-simulated the result of Friday's Boulter-Ruzic women's singles match, forming part of our tennis predictions coverage.

Our independent predictive model currently gives Boulter a 58% chance of beating Ruzic at the WTA Japan Open tournament. Additionally, Boulter has a 57% chance of winning the first set. The simulations also show that the oddsmakers have got it right with the +2.5 games spread, with each player projected to have a 50-50 chance of covering, while the over 21.5 games has a 52% chance of hitting, according to our model.

Latest betting odds

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

• Moneyline: Antonia Ruzic +147, Katie Boulter -172
• First Set: Boulter -164, Ruzic +130

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: Ruzic @ +147 via DraftKings
• First Set: Ruzic @ -110 via DraftKings

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

Although Ruzic 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 current available odds.

Game info & first serve details

The WTA Japan Open match between Katie Boulter and Antonia Ruzic is scheduled to commence on Friday at 2:00 AM ET.

• Who: Katie Boulter vs. Antonia Ruzic
• Date: Friday, October 23, 2026
• Approx. Time: 2:00 AM ET/11:00 PM PT
• Tournament: WTA Osaka, Japan Women's Singles 2026
• Round: Quarterfinals

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

Conclusion

We predict Katie Boulter, with a 58% win probability, will likely beat Antonia Ruzic at the WTA Japan Open tournament.

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

This article's predictions and probabilities are generated by Dimers' proprietary Tennis prediction model. Our editorial team reviews the resulting content for accuracy and presentation before publication.