2019: Three ATP doubles titles

Gillé won his first ATP Tour doubles title at the 2019 Swedish Open with fellow Belgian Joran Vliegen. A week later, they won their second title at Gstaad. In the next week, their 11-match winning streak was ended in the final of Kitzbühel. Two months later, Gillé and Vliegen picked up their third title of 2019 at the Zhuhai Championships.^[2]

2020–2021: Two ATP doubles titles, first Major quarterfinal, Masters semifinal, top 25

Gillé won two more titles with his partner Jordan Vliegen at the 2020 Astana Open and at the 2021 Singapore Open. They also reached the quarterfinals at the 2020 US Open (tennis) losing to the eventual runners-up Mektic/Koolhof, their best showing as a pair at a Grand Slam thus far.

The pair made their first Masters 1000 semifinal at the 2021 Madrid Open, losing to the second-seeded pair of Pavic/Mektic. As a result, Gillé reached a career-high of No. 33 on 10 May 2021.

2023: First Grand Slam doubles final, top 20 debut

At the 2023 French Open, Gillé having never get passed the third round at this Major, partnering Vliegen as an unseeded pair, they reached their first Major final defeating fourth seeds Croatians Nikola Mektić/Mate Pavić, Roman Jebavý/Luis David Martínez, ninth seeds Santiago González/Édouard Roger-Vasselin, 14th seed Argentines Andrés Molteni/Máximo González^[3] and 12th seeds Andreas Mies/Matwé Middelkoop.^[4][5] In the final, they lost to Ivan Dodig and Austin Krajicek in straight sets.^[6] He made his top 20 debut on 7 August 2023.

Grand Slam finals

Doubles: 1 (runner-up)

Result	Year	Tournament	Surface	Partner	Opponents	Score
Loss	2023	French Open	Clay	Joran Vliegen	Ivan Dodig Austin Krajicek	3–6, 1–6

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

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Jul 2019	Swedish Open	250 Series	Clay	Joran Vliegen	Federico Delbonis Horacio Zeballos	6–7(5–7), 7–5, [10–5]
Win	2–0	Jul 2019	Swiss Open	250 Series	Clay	Joran Vliegen	Philipp Oswald Filip Polášek	6–4, 6–3
Loss	2–1	Aug 2019	Austrian Open	250 Series	Clay	Joran Vliegen	Philipp Oswald Filip Polášek	4–6, 4–6
Win	3–1	Sep 2019	Zhuhai Championships, China	250 Series	Hard	Joran Vliegen	Marcelo Demoliner Matwé Middelkoop	7–6(7–2), 7–6(7–4)
Win	4–1	Nov 2020	Astana Open, Kazakhstan	250 Series	Hard (i)	Joran Vliegen	Max Purcell Luke Saville	7–5, 6–3
Win	5–1	Feb 2021	Singapore Open	250 Series	Hard (i)	Joran Vliegen	Matthew Ebden John-Patrick Smith	6–2, 6–3
Loss	5–2	May 2021	Bavarian Championships, Germany	250 Series	Clay	Joran Vliegen	Wesley Koolhof Kevin Krawietz	6–4, 4–6, [5–10]
Win	6–2	Jan 2023	Maharashtra Open, India	250 Series	Hard	Joran Vliegen	Sriram Balaji Jeevan Nedunchezhiyan	6–4, 6–4
Win	7–2	Apr 2023	Estoril Open, Portugal	250 Series	Clay	Joran Vliegen	Nikola Ćaćić Miomir Kecmanović	6–3, 6–4
Loss	7–3	Jun 2023	French Open, France	Grand Slam	Clay	Joran Vliegen	Ivan Dodig Austin Krajicek	3–6, 1–6
Loss	7–4	Jul 2023	Hamburg European Open, Germany	500 Series	Clay	Joran Vliegen	Kevin Krawietz Tim Pütz	6–7(4–7), 3–6
Loss	7–5	Jan 2024	Hong Kong Open, Hong Kong	250 Series	Hard	Joran Vliegen	Marcelo Arévalo Mate Pavić	6–7(3–7), 4–6

Singles: 2 (1–1)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Nov 2015	Norway F3, Oslo	Futures	Hard (i)	Carl Söderlund	4–6, 2–6
Win	1–1	May 2016	Ukraine F1, Cherkasy	Futures	Clay	Vladyslav Manafov	6–4, 3–6, 6–4

Doubles: 63 (40–23)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Aug 2011	Belgium F9, Jupille-sur-Meuse	Futures	Clay	Marco Dierckx	Guillermo Hormazábal Rodrigo Pérez	4–6, 6–7(2–7)
Loss	0–2	Mar 2013	Great Britain F6, Shrewsbury	Futures	Hard (i)	Jonas Merckx	David Rice Sean Thornley	2–6, 1–6
Win	1–2	Jul 2013	Belgium F4, Knokke	Futures	Clay	Maxime Braeckman	Joris De Loore Juan Carlos Sáez	6–2, 5–7, [10–6]
Loss	1–3	Aug 2013	Belgium F7, Ostend	Futures	Clay	Roger Ordeig	Kimmer Coppejans Niels Desein	2–6, 3–6
Win	2–3	Aug 2013	Belgium F8, Eupen	Futures	Clay	Joran Vliegen	Gustavo Gómez Buyatti Antoine Hoang	6–3, 6–3
Win	3–3	Nov 2013	Cyprus F2, Nicosia	Futures	Hard	Matthieu Roy	Erik Crepaldi André Gaspar Murta	6–1, 6–3
Loss	3–4	Jun 2014	Israel F9, Tel Aviv	Futures	Hard	Alexandros Jakupovic	Peter Kobelt Devin McCarthy	2–6, 7–6(7–3), [4–10]
Win	4–4	Jul 2014	Belgium F8, Heist	Futures	Clay	Julien Cagnina	Evgeny Karlovskiy Tom Schönenberg	6–4, 7–5
Loss	4–5	Aug 2014	Belgium F9, Ostend	Futures	Clay	Antoine Hoang	Scott Griekspoor Alban Meuffels	2–6, 4–6
Win	5–5	Aug 2014	Belgium F11, Koksijde	Futures	Clay	Joran Vliegen	Jake Eames David Pérez Sanz	3–6, 6–3, [12–10]
Loss	5–6	Sep 2014	Tunisia F4, Carthage	Futures	Clay	Alexandros Jakupovic	Claudio Grassi Stefano Travaglia	2–6, 3–6
Loss	5–7	Nov 2014	Greece F11, Heraklion	Futures	Clay	Alexis Musialek	Alexandros Jakupovic Markos Kalovelonis	6–7(1–7), 6–7(4–7)
Win	6–7	Dec 2014	Egypt F35, Sharm El Sheikh	Futures	Hard	Germain Gigounon	Pascal Brunner Janez Semrajc	1–6, 6–1, [10–8]
Loss	6–8	Feb 2015	Sri Lanka F2, Colombo	Futures	Clay	Huang Liang-chi	Libor Salaba Jan Šátral	2–6, 6–4, [9–11]
Win	7–8	Jun 2015	Belgium F2, Damme	Futures	Clay	Joran Vliegen	Antoine Hoang Ugo Nastasi	6–2, 6–3
Loss	7–9	Jun 2015	Belgium F3, Havré	Futures	Clay	Joran Vliegen	Deiton Baughman Fabrício Neis	6–2, 4–6, [2–10]
Win	8–9	Jul 2015	Belgium F7, Duinbergen	Futures	Clay	Joran Vliegen	Julien Cagnina Jonas Merckx	6–7(5–7), 6–4, [10–6]
Loss	8–10	Aug 2015	Belgium F8, Middelkerke	Futures	Hard	Joran Vliegen	Sander Arends Ariel Behar	7–6(7–1), 4–6, [7–10]
Loss	8–11	Aug 2015	Belgium F9, Eupen	Futures	Clay	Joran Vliegen	Billy Harris Evan Hoyt	6–7(5–7), 3–6
Win	9–11	Aug 2015	Belgium F10, Koksijde	Futures	Clay	Joran Vliegen	Evan Hoyt Toby Martin	6–2, 6–1
Win	10–11	Aug 2015	Belgium F11, Jupille-sur-Meuse	Futures	Clay	Joran Vliegen	Evan Hoyt Toby Martin	6–1, 6–4
Win	11–11	Oct 2015	Norway F2, Oslo	Futures	Hard (i)	Joran Vliegen	Ivan Sabanov Matej Sabanov	6–7(4–7), 7–6(7–5), [10–8]
Win	12–11	Nov 2015	Norway F3, Oslo	Futures	Hard (i)	Joran Vliegen	Ivan Sabanov Matej Sabanov	7–6(7–3), 6–1
Win	13–11	Dec 2015	Israel F17, Ramat Gan	Futures	Hard	Michael Geerts	Yannai Barkai Daniel Dudockin	6–2, 6–1
Win	14–11	Dec 2015	Israel F18, Ramat Gan	Futures	Hard	Julien Dubail	George Botezan Mor Bulis	6–3, 4–6, [10–4]
Win	15–11	Jan 2016	France F2, Bressuire	Futures	Hard (i)	Joran Vliegen	Benjamin Bonzi Grégoire Jacq	7–6(7–1), 7–5
Win	16–11	Jan 2016	France F3, Veigy-Foncenex	Futures	Carpet (i)	Joran Vliegen	Scott Clayton Richard Gabb	6–7(4–7), 7–6(8–6), [10–7]
Loss	16–12	Mar 2016	Egypt F7, Sharm El Sheikh	Futures	Hard	Joran Vliegen	Dominik Kellovský Jaroslav Pospíšil	6–3, 3–6, [11–13]
Win	17–12	Mar 2016	Egypt F8, Sharm El Sheikh	Futures	Hard	Joran Vliegen	Tom Schönenberg Matthias Wunner	6–3, 7–6(7–2)
Win	18–12	Apr 2016	Uzbekistan F2, Bukhara	Futures	Hard	Joran Vliegen	Evgeny Elistratov Vitaly Kozyukov	6–4, 6–3
Win	19–12	May 2016	Ukraine F1, Cherkasy	Futures	Clay	Joran Vliegen	Antoine Bellier Vladyslav Manafov	6–3, 4–6, [11–9]
Win	20–12	Jun 2016	Belgium F2, Havré	Futures	Clay	Joran Vliegen	Adam Taylor Jason Taylor	6–2, 6–4
Win	21–12	Jul 2016	Belgium F3, Nieuwpoort	Futures	Clay	Joran Vliegen	Stijn Meulemans Laurens Verboven	6–2, 6–3
Win	22–12	Jul 2016	Belgium F6, Knokke	Futures	Clay	Joran Vliegen	Hunter Johnson Yates Johnson	6–4, 6–4
Win	23–12	Jul 2016	Belgium F7, Duinbergen	Futures	Clay	Joran Vliegen	Michael Geerts Jeroen Vanneste	6–7(4–7), 6–3, [10–4]
Win	24–12	Aug 2016	Morocco F5, Tangier	Futures	Clay	Antoine Hoang	Gianni Mina Alexandre Müller	6–4, 7–6(9–7)
Win	25–12	Aug 2016	Trnava, Slovakia	Challenger	Clay	Joran Vliegen	Tomasz Bednarek Roman Jebavý	6–2, 7–5
Loss	25–13	Aug 2016	Meerbusch, Germany	Challenger	Clay	Joran Vliegen	Mikhail Elgin Andrei Vasilevski	6–7(6–8), 4–6
Loss	25–14	Aug 2016	Belgium F11, Huy	Futures	Clay	Joran Vliegen	Jarryd Bant Tom Farquharson	3–6, 2–6
Loss	25–15	Mar 2017	Turkey F10, Antalya	Futures	Clay	Joran Vliegen	Tuna Altuna Cem İlkel	6–0, 2–6, [8–10]
Win	26–15	May 2017	Italy F12, Naples	Futures	Clay	Joran Vliegen	Antal van der Duim Boy Westerhof	6–4, 6–2
Win	27–15	May 2017	Romania F1, Bucharest	Futures	Clay	Joran Vliegen	Andrei Ștefan Apostol Nicolae Frunză	7–6(7–5), 6–2
Win	28–15	Jun 2017	Lyon, France	Challenger	Clay	Joran Vliegen	Gero Kretschmer Alexander Satschko	6–7(2–7), 7–6(7–2), [14–12]
Win	29–15	Jun 2017	Blois, France	Challenger	Clay	Joran Vliegen	Máximo González Fabrício Neis	3–6, 6–3, [10–7]
Win	30–15	Jul 2017	Scheveningen, Netherlands	Challenger	Clay	Joran Vliegen	Jozef Kovalík Stefanos Tsitsipas	6–2, 4–6, [12–10]
Win	31–15	Jul 2017	Tampere, Finland	Challenger	Clay	Joran Vliegen	Lucas Gómez Juan Ignacio Londero	6–2, 6–7(5–7), [10–3]
Loss	31–16	Sep 2017	Sibiu, Romania	Challenger	Clay	Joran Vliegen	Marco Cecchinato Matteo Donati	3–6, 1–6
Loss	31–17	Sep 2017	Rome, Italy	Challenger	Clay	Joran Vliegen	Martin Kližan Jozef Kovalík	3–6, 6–7(5–7)
Win	32–17	Nov 2017	Brescia, Italy	Challenger	Hard (i)	Sander Arends	Luca Margaroli Tristan-Samuel Weissborn	6–2, 6–3
Loss	32–18	Nov 2017	Andria, Italy	Challenger	Hard (i)	Sander Arends	Lorenzo Sonego Andrea Vavassori	3–6, 6–3, [7–10]
Win	33–18	Jan 2018	Rennes, France	Challenger	Hard (i)	Joran Vliegen	Sander Arends Antonio Šančić	6–3, 6–7(1–7), [10–7]
Loss	33–19	Feb 2018	Quimper, France	Challenger	Hard (i)	Joran Vliegen	Ken Skupski Neal Skupski	3–6, 6–3, [7–10]
Loss	33–20	May 2018	Rome, Italy	Challenger	Clay	Joran Vliegen	Kevin Krawietz Andreas Mies	3–6, 6–2, [4–10]
Win	34–20	Jul 2018	Prague, Czech Republic	Challenger	Clay	Joran Vliegen	Fernando Romboli David Vega Hernández	6–4, 6–2
Win	35–20	Aug 2018	Liberec, Czech Republic	Challenger	Clay	Joran Vliegen	Filip Polášek Patrik Rikl	6–3, 6–4
Win	36–20	Aug 2018	Pullach, Germany	Challenger	Clay	Joran Vliegen	Daniele Bracciali Simone Bolelli	6–2, 6–2
Win	37–20	Oct 2018	Ortisei, Italy	Challenger	Hard (i)	Joran Vliegen	Purav Raja Antonio Šančić	3–6, 6–3, [10–3]
Win	38–20	Oct 2018	Brest, France	Challenger	Hard (i)	Joran Vliegen	Leander Paes Miguel Ángel Reyes-Varela	3–6, 6–4, [10–2]
Win	39–20	Nov 2018	Mouilleron-le-Captif, France	Challenger	Hard (i)	Joran Vliegen	Romain Arneodo Quentin Halys	6–3, 4–6, [10–2]
Loss	39–21	Jan 2019	Punta del Este, Uruguay	Challenger	Clay	Joran Vliegen	Guido Andreozzi Guillermo Durán	2–6, 7–6(8–6), [8–10]
Loss	39–22	Mar 2019	Marbella, Spain	Challenger	Clay	Joran Vliegen	Kevin Krawietz Andreas Mies	6–7(6–8), 6–2, [6–10]
Win	40–22	Jun 2019	Bratislava, Slovakia	Challenger	Clay	Joran Vliegen	Lukáš Klein Alex Molčan	6–2, 7–5
Loss	40-23	Sep 2019	New Haven, USA	Challenger	Hard	Joran Vliegen	Nathaniel Lammons Robert Galloway	5–7, 4–6

Doubles

Current through the 2022 Davis Cup.

Mixed doubles

This table is current through the 2023 US Open.

Participations: (1–1)

• indicates the outcome of the Davis Cup match followed by the score, date, place of event, the zonal classification and its phase, and the court surface.

Rubber outcome	No.	Rubber	Match type (partner if any)	Opponent nation	Opponent player(s)	Score
0–4; 6–8 April 2018; Curb Event Center, Nashville, United States; World Group Quarterfinal; hard surface
Defeat	1	III	Doubles (with Joran Vliegen)	United States	Ryan Harrison / Jack Sock	7–5, 6–7(1–7), 6–7(3–7), 4–6
3–1; 1–2 February 2019; Ginásio Municipal Tancredo Neves, Uberlândia, Brazil; Davis Cup qualifying round; clay (indoor) surface
Victory	2	III	Doubles (with Joran Vliegen)	Brazil	Marcelo Melo / Bruno Soares	6–4, 7–6(7–4)