Gilles-Arnaud Bailly

Gilles-Arnaud Bailly (born 19 September 2005) is a Belgian professional tennis player. He has a career-high ATP singles ranking of No. 201 achieved on 10 November 2025 and a doubles ranking of No. 1,723, reached on 27 February 2023.

Junior career Bailly was a runner-up at the 2022 French Open and at the 2022 US Open in the boys' singles category. He reached an ITF junior combined ranking of world No. 1 on 28 November 2022. He became the first Junior player from Belgium to be crowned a world junior champion by the ITF. He had notable results on ITF junior circuit, maintaining a 97–40 singles win-loss record.

Professional career

2022: ATP Tour debut Bailly made his debut at the 2022 European Open where he received a main draw wildcard but lost in the first round to compatriot David Goffin despite playing for more than three hours and winning the second set.

2023-25: First Challenger final and ATP win, top 205 Bailly received another invitation at European Open, for the qualies. The following year, he qualified to the main draw of his home tournament but lost to German Daniel Altmaier.

Ranked No. 247, Bailly qualified again for his home event, that edition hosted in Brussels, and recorded his first ATP Tour win, over the same player, Altmaier, who defeated him the previous year. He lost to third seed Jiří Lehečka in the second round. As a result, he moved into the top 235 in the singles rankings and entered the qualification zone of the NextGen Finals. He eventually made it as a first alternate, having been ranked 11th in the race, following the withdrawal of the two top players.

Bailly finished that year at No. 204 in singles, having reached a career-high of world No. 201 the week before. It was the third-largest rankings climb for the 2025 season - behind Rafael Jódar and Petr Brunclík - raising close to 600 positions.

Performance timeline

Singles Current through the 2026 Australian Open.

ATP Challenger Tour finals

Singles: 1 (runner-up)

ITF World Tennis Tour finals

Singles: 12 (7 titles, 5 runner-ups)

Finals by surfaceHard (2–2)Clay (5–3)

Junior Grand Slam finals

Singles: 2 (2 runner-ups)

Awards

2022 ITF Junior World Champion