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St. Tropez Predictions & Picks — September 24, 2026

By The Maiden Desk · September 24, 2026

Every number below was fixed before the match and graded against the official result.

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4 matches are on Thursday's card at St. Tropez, and we have a pick for every one of them. The headline act: Edas Butvilas against Harold Mayot in the round of 16. Our calls: Mayot over Butvilas, Harris over Cassone, Jong over Guerrieri, Masur over Martineau.

The boldest call on the card: Mayot over Butvilas — the market disagrees with us there.

Billy Harris vs Murphy Cassone

✗ Pick wrongA miss: Billy Harris at 53% lost to Murphy Cassone (7-6 6-4).

Pick: Harris

Win probability: 53% Harris · Market: -104 · We call it in 3 sets (49%) · single likeliest score 2-1 (27%)

A spot in the next round is at stake on Thursday, when Billy Harris goes up against Murphy Cassone in the St. Tropez round of 16. Billy Harris comes in at 4 wins from the last ten. Murphy Cassone comes in at 5 wins from the last ten.

On paper it's close: comparable ratings, comparable serve numbers, small margins everywhere. Cassone comes in off a compressed schedule. This one is close to a coin flip, and the lean toward Harris is exactly that — a lean.

Daniel Masur vs Matteo Martineau

✓ Pick rightWe got this one right. Daniel Masur was our 52% pick, and won 6-3 5-7 6-3.

Pick: Masur

Win probability: 52% Masur · Market: -107 · We call it in 3 sets (50%) · single likeliest score 2-1 (27%)

Thursday's St. Tropez round of 16 pits Daniel Masur against Matteo Martineau on hard. Daniel Masur has won 6 of the last 10. Matteo Martineau comes in at 5 wins from the last ten.

On paper it's close: comparable ratings, comparable serve numbers, small margins everywhere. A tiebreak or two would surprise nobody, with Masur fractionally more likely to land the big points.

Edas Butvilas vs Harold Mayot

✓ Pick rightNailed it. We had Harold Mayot at 53% before the match, and Harold Mayot won 6-4 6-3.

Pick: MayotUpset call

Upset call: the market makes Butvilas the favorite; our numbers say Mayot.

Win probability: 53% Mayot · Market: +136 · We call it in 3 sets (51%) · single likeliest score 2-1 (27%)

Thursday's St. Tropez round of 16 pits Edas Butvilas against Harold Mayot on hard. Harold Mayot comes in at 7 wins from the last ten. Edas Butvilas comes in at 7 wins from the last ten.

There's a wide gap in our ratings on hard, and our number follows from it. A tiebreak or two would surprise nobody, with Mayot fractionally more likely to land the big points.

Andrea Guerrieri vs Jesper De Jong

✓ Pick rightNailed it. We had Jesper De Jong at 56% before the match, and Jesper De Jong won 3-6 7-6 7-6.

Pick: Jong

Win probability: 56% Jong · Market: -201 · We call it in 3 sets (44%) · single likeliest score 2-0 (32%)

Andrea Guerrieri and Jesper De Jong meet in the round of 16 at St. Tropez on Thursday. Jesper De Jong has won 4 of the last 10. Andrea Guerrieri has won 6 of the last 10.

The serve is where this match separates: Jong has been winning 72.9% of first-serve points to Guerrieri's 66%, and on hard that gap compounds fast. A tiebreak or two would surprise nobody, with Jong fractionally more likely to land the big points.

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Updated Sep 23, 2026, 9:31 PM UTC. Picks are frozen before first serve and graded on the track record page — this page is never edited after the fact.