Griekspoor vs Arnaldi Picks, Predictions & Odds

• Tallon Griekspoor is a -163 favorite over Matteo Arnaldi in Round 3 action at ATP Montreal
• Arnaldi won the only head-to-head matchup earlier this year at the French Open
• See my Griekspoor vs Arnaldi, picks, predictions and updated odds below

Tennis bettors are in for a highly wagerable Round of 32 clash as Tallon Griekspoor squares off against Matteo Arnaldi at the ATP Montreal Men’s Singles tournament.

This hard-court battle offers intriguing betting angles, with Griekspoor entering as the betting chalk, though I am eyeing Arnaldi as a live underdog ready to pull off a lucrative upset and punch his ticket to the Round of 16.

This one goes Friday afternoon at 12:30pm ET from Center Court at IGA Stadium in Montreal, with the Tennis Channel providing the broadcast coverage in the US, and Sportsnet carrying the matches in Canada.

Griekspoor vs Arnaldi Picks

• Pick: Arnaldi Moneyline (+132 at Kalshi)

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Kalshi

Arnaldi to Win

43%

Predict

Despite stepping onto the North American hard courts as the betting underdog, I see value in Matteo Arnaldi on the moneyline.

Backing the Italian here starts with the broader rating picture: Arnaldi sits higher in the ATP rankings at No. 35 (1,299 points) than Griekspoor at No. 69 (885 points), and he is also ahead in the ATP Singles Race at No. 28 compared to Griekspoor’s No. 64 spot.

The current Elo board tells a similar story overall, with Arnaldi rated 1786.8 (No. 57) and Griekspoor at 1763.8 (No. 70). Griekspoor does own the better hard-court-specific Elo, 1755.1 to 1704.6, so this is not a blind fade of the surface fit. But the overall Elo gap and the ranking/race edge make Arnaldi look much closer to a coin-flip than a +132 underdog.

The recent results also support Arnaldi’s upset case. He opened in Montreal by beating Fabian Marozsan 7-5, 2-6, 6-4, and his 2026 résumé includes a French Open surge with wins over Griekspoor, Stefanos Tsitsipas, Frances Tiafoe, and Matteo Berrettini.

Go back to this same Canadian Masters stop in 2024, and Arnaldi showed he can handle these conditions, beating Mackenzie McDonald, Karen Khachanov, Alejandro Davidovich Fokina, and Kei Nishikori before falling to Andrey Rublev. That is the type of opponent-adjusted evidence Elo is designed to capture, and it keeps me interested in the plus-money side.

Griekspoor vs Arnaldi Prediction

• Game Total Pick: Over 23.5 Total Games (+108 at Kalshi)

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Kalshi

Over 23.5 Total Games

58%

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Their lone previous meeting produced 44 total games and featured two tightly contested tiebreaks, setting a strong precedent for lengthy sets.

The primary driver for this lofty game count is Griekspoor’s serving dynamic. The Dutchman hits a heavy ball and recorded nine aces in their previous encounter, ensuring he secures quick holds of serve.

However, his inability to capitalize on return games—going a dismal 0-for-5 on break points in their prior matchup—means he consistently struggles to generate separation on the scoreboard. With Griekspoor successfully holding serve via his hefty ace rate but failing to break Arnaldi’s steady baseline delivery, these sets are highly likely to remain deadlocked and push deep into tiebreak territory. Landing the Over at plus-money (+108) is an absolute steal based on these specific hold and break percentages.

Griekspoor vs Arnaldi Odds

Odds as of August 6 at bet365. Get a bet365 bonus code to wager on all tennis matches.

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Griekspoor checks in with -163 odds on the moneyline, with Arnaldi — ranked 30th in Montreal — checking in with +130 odds.

The Italian is also getting 1.5 games on the spread, which still pays at -110, while Griekspoor winning by at least two games pays out at -125 odds. The total is set at 23.5 games, with -120 odds on either side of the wager.

When they battled earlier this year at the French Open, Arnaldi neutralized Griekspoor’s heavy serve in critical windows, generating 12 break-point opportunities and converting four of them.

Just as crucially, Arnaldi shut the door on his own service games, erasing all five break points he faced. That discipline on serve—committing just two double faults to Griekspoor’s nine—provides a clear, data-backed path to victory for the Italian. With odds of +132 available via Kalshi, I am backing the dog.