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US Open Tennis: Thursday best bets featuring Jannik Sinner on Day 5
Updated: | First published:
Written by Dave Garofolo, Content Producer
Reviewed by Nick Slade
The US Open is underway as the final grand slam of the year is up and rolling in Flushing, NY and we have your Day 5 guide to betting on the tournament.
The 2025 US Open continues in New York City on Thursday, August 28 for Day 5 at Flushing Meadows. The fourth and final Grand Slam of the year is already full of exciting storylines and will continue to shape the legacy of its eventual winners, but it's also a major event for those looking for the best bets and tennis predictions. The tournament runs through to Championship Sunday on September 7.
The Dimers model has gotten off to a hot start, including a 2-0 day on our best High Value bets from Day 3 of the US Open and predicting key advancements for Jack Draper and Emma Raducanu.
Big names will be all over the courts today from Alexander Zverev to Jannik Sinner and Iga Swiatek in second round matchups.
Add in Dimers’ biggest betting offering ever—expanded markets, new bet types, and broader sportsbook coverage—and there’s never been a better time to bet on the US Open.
Best Value Bets for Day 5 of the US Open
Dimers highlights “High Value” bets when favorable odds line up with strong probability.
Two wagers stand out on on Wednesday as bets with both High Value and over a 60.0% probability:
Jannik Sinner vs. Alexei Popyrin Under 31.5 Games
- Court: Arthur Ashe Stadium
- Win Probability: 61.7%
- Edge: 7.1%
- Best Odds: -120 (DraftKings Sportsbook)
See our full predictions for Sinner-Popyrin on Thursday, including our picks for the ML and spread..
Alexander Zverev -6.5 vs. Jacob Fearnley
- Court: Louis Armstrong Stadium
- Win Probability: 70.8%
- Edge: 12.4%
- Best Odds: –140 (Caesars Sportsbook)
This is our highest edge of the, presenting fair odds of -242 for a big-time value play. For more betting insights on this match, read our full prediction for Zverev vs. Fearnley on Thursday, August 28.
To find more value bets, including some moneyline upsets and more, check out Dimers' Best Tennis Bets every day of the US Open.
Betting the US Open Smartly
The opening round is all about balance—taking advantage of sharp value edges while recognizing the volatility of early rounds. Heavy favorites like Alexander Zverev and Iga Swiatek look like strong bets to advance, while Dimers’ Day 5 “High Value” picks provide bettors with calculated opportunities. Keep an eye on tight matches like Karolina Muchova vs. Sorana Cirstea, where the win margin is razor thin.
With Flushing Meadows buzzing, the 2025 US Open is primed for drama, and Dimers is giving bettors every tool they need to play it smart.
Responsible Gambling
Remember to please gamble responsibly. If you sense that you're taking your luck too far, know when to call it quits and don't be afraid to seek assistance. Keep in mind that gambling is all about having a fantastic experience! If you or someone you know is grappling with gambling issues, reach out to 1-800-GAMBLER for crisis counseling and support.
To give you the most accurate and helpful information, this article has been reviewed and edited by Nick Slade through our fact-checking process.
Dave Garofolo uses sophisticated AI-driven analytics to make predictions and evaluate player performances in the NBA, MLB, NFL, NHL, NCAAM, and PGA TOUR tournaments, crafting insightful game and prop previews.
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