2020: Grand Slam doubles debut

Cazaux made his ATP main draw debut at the 2020 Open 13 in the doubles draw partnering Harold Mayot as a wildcard entry. They were defeated in the first round by Nicolas Mahut and Vasek Pospisil in straight sets 5–7, 1–6.

Pairing Mayot again, they were also given a wildcard entry into the main doubles draw of the 2020 French Open but were defeated in the first round by Łukasz Kubot and Marcelo Melo in straight sets.

2021: Major & top 300 singles debuts, first ATP win

Cazaux made his singles debut the following year in 2021 Geneva Open as a wildcard, winning his first ATP match against compatriot Adrian Mannarino in three sets.^[3] As a result, he entered the top 500 for the first time in his career.

He made his Grand Slam main draw singles debut at the 2021 French Open as a wildcard where he was defeated by Kamil Majchrzak. At the same tournament, he reached the second round in doubles also as a wildcard partnering with fellow Frenchman Hugo Gaston.

2022: First Challenger title

Cazaux won his maiden Challenger title in September 2022 in Nonthaburi, Thailand, entering the main draw as a qualifier and defeating Omar Jasika in the final. Reaching the final of that same tournament the following week, Cazaux lost to Brit, Stuart Parker, pulling out due to injury in the second set.

2023: Top 120, US Open debut

In January 2023, he won his second title also at the Nonthaburi 2 Challenger defeating former top 50 player Lloyd Harris.^[4][5] Continuing his good form, Cazaux reached the final again the following week, losing to Japanese player Sho Shimabukuro in straight sets. As a result of his performances, he achieved a new career-high, moving more than 100 positions up to No. 265 on 16 January 2023. He reached the top 200 at No. 199 on 10 April 2023 following a semifinal showing in the Zadar Challenger.

He received a wildcard for the 2023 French Open.^[6]

He reached the Challenger 125 final at the 2023 Nottingham Open as a qualifier, his first on grass, defeating Gabriel Diallo^[7] and fifth seed Dominik Koepfer in the semifinals without dropping a set,^[8] before losing to top seed Andy Murray in the final.^[9] As a result he reached the top 150 at No. 147 on 19 June 2023 and seventh place in the Next Gen race.^[10] The following week, he reached the semifinals of the 2023 Ilkley Trophy and reached a new career high of world No. 139 on 26 June 2023.^[11]

Ranked No. 119 in August, Cazaux made his debut at the US Open as a lucky loser, losing to eight seed Andrey Rublev in the first round.^[12] He received a wildcard for the 2023 Moselle Open.^[13]

2024: Australian Open debut and fourth round, first top 10 win, top 80

He won his third Challenger at the 2024 Open Nouvelle-Calédonie.^[14]

Ranked No. 122, for his Grand Slam debut at the Australian Open, he received a wildcard.^[15] He recorded his first Major win defeating Laslo Djere in five sets. In the second round, he upset world No. 8 Holger Rune in four sets.^[16] He defeated 28th seed Tallon Griekspoor in straight sets to advance to the fourth round of a Major for the first time in his career.^[17][18] In the fourth round, he lost to Hubert Hurkacz in straight sets. As a result he moved close to 40 positions up and reached the top 85 in the rankings.^[19] A week later, in Montpellier, he defeated Maximilian Marterer and reached the top 80 in the rankings on 5 February 2024. Next, at the end February, he qualified for the 2024 Dubai Tennis Championships and defeated Lorenzo Musetti in the first round.

Singles

Doubles

Singles: 13 (6 titles, 7 runner-ups)

More information Result, W–L ...

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Oct 2019	M15 Pretoria, South Africa	World Tennis Tour	Hard	Alexander Donski	6–7(3–7), 7–6(7–5), 6–7(6–8)
Win	1–1	Dec 2020	M15 Torelló, Spain	World Tennis Tour	Hard	Quentin Robert	4–6, 7–6(7–3), 6–2
Loss	1–2	Apr 2021	M25 Meerbusch, Germany	World Tennis Tour	Clay	Alexander Erler	2–6, 6–4, 5–7
Loss	1–3	Aug 2021	M25+H Bacău, Romania	World Tennis Tour	Clay	Yshai Oliel	4–6, 6–4, 4–6
Win	2–3	Oct 2021	M25 Setúbal, Portugal	World Tennis Tour	Hard	Rinky Hijikata	7–5, 6–0
Win	3–3	Oct 2021	M25 Quinta do Lago, Portugal	World Tennis Tour	Hard	Naoki Nakagawa	6–3, 6–4
Win	4–3	Sep 2022	Nonthaburi 2, Thailand	Challenger	Hard	Omar Jasika	7–6(8–6), 6–4
Loss	4–4	Sep 2022	Nonthaburi 3, Thailand	Challenger	Hard	Stuart Parker	4–6, 1–4 ret.
Win	5–4	Jan 2023	Nonthaburi 2, Thailand	Challenger	Hard	Lloyd Harris	7–6(7–5), 6–2
Loss	5–5	Jan 2023	Nonthaburi 3, Thailand	Challenger	Hard	Sho Shimabukuro	2–6, 5–7
Loss	5–6	Jun 2023	Nottingham, UK	Challenger	Grass	Andy Murray	4–6, 4–6
Loss	5–7	Jul 2023	Lexington, USA	Challenger	Hard	Steve Johnson	6–7(5–7), 4–6
Win	6–7	Jan 2024	Nouméa, New Caledonia	Challenger	Hard	Enzo Couacaud	6–1, 6–1

Close

Doubles: 2 (2 runner-ups)

More information Result, W–L ...

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Dec 2020	M15 Torelló, Spain	World Tennis Tour	Hard	Leandro Riedi	Gerard Granollers Pujol Oriol Roca Batalla	6–7(7–9), 6–3, [9–11]
Loss	0–2	Apr 2021	M25 Angers, France	World Tennis Tour	Clay	Titouan Droguet	Manuel Guinard Corentin Denolly	walkover

Close

Singles: 1 (1 runner-up)

More information Result, Year ...

Result	Year	Tournament	Surface	Opponent	Score
Loss	2020	Australian Open	Hard	Harold Mayot	4–6, 1–6

Close