Gabriel Diallo faces a tough challenge in the round of 32 at the Cincinnati Open.
The pre-match narrative: Diallo won a hard-fought match against Sebastian Baez in the second round. He’s about to face a much tougher challenge in the form of Jannik Sinner. The Canadian is playing some solid tennis, but naturally, he enters as a major underdog.
Check out our Sinner vs. Diallo odds and my best bet for the Aug. 11 tennis match.
Sinner vs. Diallo odds
Full Cincinnati Open betting markets
Best men’s tennis pick
Best Bet: Under 18.5 games (+110)
I don’t see many scenarios where Diallo keeps this match close.
That’s no disrespect to the rising Canadian star. Diallo owns a respectable 14-11 record on the hard courts this year and has won at least one match at eight consecutive tournaments.
But there are levels to the ATP Tour, and Sinner is one of two players on the game’s most elite tier.
The reigning Australian Open, Wimbledon, and US Open champion is coming into his own as arguably the sport’s very best. He enters this match a perfect 8-0 on the hard courts this year, and that includes a 6-1, 6-1 victory over Daniel Elahi Galan in his first match in Cincinnati.
While Diallo might fare better than Elahi Galan, don’t count on him going the distance with Sinner.
Diallo hasn’t proven that he can hang with that level of competition just yet.
Here’s how he’s performed in his two matches against top-10 competitors during this hard-court swing:
- Lost 6-4, 6-2 to Taylor Fritz (18 games).
- Lost 6-3, 6-2 to Ben Shelton (17 games).
It’s clear that there’s still a gap between Diallo and some of the game’s very best.
It’s important to mention, too, that there remains a significant gap between the fantastic Sinner and top talents like Fritz and Shelton.
Diallo is improving with every match, but there’s very little forgiveness in a matchup against Sinner.
Key stat: Sinner is 61-5 on hard courts since 2024.
Sinner vs. Diallo best bet made at 2:47 p.m. on 08/10/2025.
Stevie’s an avid NFL, NHL, and tennis bettor who has no problem talking himself into the underdog. His previous stops include Yahoo! Sports Canada and Toronto Metropolitan University, where he received a degree in Sport Media.