Arthur Cazaux is the Montpellier kid who came up in the loaded junior class of Alcaraz, Sinner and Rune, then watched all three sprint to the top while injuries stalled his own start. He was a runner-up at the 2020 Australian Open boys' final, losing to compatriot Harold Mayot in straight sets, peaking at junior world No. 4. He made his singles debut in 2021 at the Geneva Open as a wildcard, winning his first ATP match against compatriot Adrian Mannarino in three sets to enter the top 500 for the first time.
The game is built around a heavy, free-points serve — Cazaux attributes his big delivery to years of playing handball as a kid — wrapped in athleticism and shot-making that reads more all-court than baseline grinder. At his best he's a show: clean baseline hitting, imaginative slice play and electric athleticism. The flip side is that against elite opposition he leans on serve when his offense gets squeezed, which is why the top-tier results have lagged the talent.
The defining fortnight remains January 2024 in Melbourne. Ranked 122 as a wildcard, he recorded his first Major win over Laslo Djere in five sets, upset world No. 8 Holger Rune in four, then beat 28th seed Tallon Griekspoor in straight sets to reach the fourth round. Rune is still his only top-10 scalp. The 2025 hardware came at Challenger and 250 level: he reached his first ATP Tour final at Kitzbühel, beating compatriot Arthur Rinderknech in the semis before losing to Alexander Bublik, then won the Jinan Open in October to debut inside the top 60 at world No. 58 on 13 October 2025 — his career high.
He opens 2026 back around No. 81, the familiar ground-out around the top-80 line. His most recent match was a Miami Open loss to Frances Tiafoe, 7-6(1), 6-1, on March 21. The brief: convert hard-court serve dominance into the top-tier wins that have so far stayed rare.