Altuğ Çelikbilek (; born 7 September 1996) is a Turkish former professional tennis player. He has a career high ATP singles ranking of world No. 154 achieved on 21 February 2022. He also has a career high ATP doubles ranking of No. 224, achieved on 25 July 2022. He is currently the tournament director of the ENKA Open. Çelikbilek has won 2 ATP Challengers and 5 ITF singles titles and 11 ITF doubles titles.

Professional career He made his Grand Slam debut at the 2021 French Open in the qualifying competition.

Çelikbilek has represented Turkey at Davis Cup, where he has a win–loss record of 5–7.

Personal life In December 2024, he suffered a stroke whilst competing at the ITF M25 in Monastir, shortly afterwards he had to have surgery to remove a brain tumour.

ATP Challenger and ITF Tour finals

Singles: 13 (9 titles, 4 runner-ups) LegendATP Challenger Tour (3–1)ITF Futures/WTT (6–3)Finals by surfaceHard (9–4)Clay (0–0)

ResultW–LDateTournamentTierSurfaceOpponentScoreLoss0–1Turkey F45, AntalyaFuturesHard Dmitry Popko2–6, 5–7Win1–1Turkey F7, AntalyaFuturesHard Alexandar Lazov4–6, 7–6(7–5), 6–4Win2–1Tunisia F16, DjerbaFuturesHard Yannick Mertens6–7(4–7), 6–3, 6–4Win3–1Germany F16, HamburgFuturesHard Louis Wessels6–2, 2–6, 6–4Win4–1M15 Monastir, TunisiaWTTHard Christoph Negritu2–6, 6–4, 6–1Win5–1M15 Sozopol, BulgariaWTTHard Alexander Donski6–7(5–7), 6–3, 6–2Loss5–2M15 Monastir, TunisiaWTTHard Matija Pecotić1–6, 1–6Loss5–3St.Petersburg, RussiaChallengerHard Zizou Bergs4–6, 6–3, 4–6Win6–3Porto, PortugalChallengerHard Quentin Halys6–2, 6–1Win7–3Pozoblanco, SpainChallengerHard Cem İlkel6–1, 6–7(2–7), 6–3Win8–3Porto, PortugalChallengerHard Christopher O'Connell7–6(7–5), 3–1 ret.Loss8–4M15 Monastir, TunisiaWTTHard Yaroslav Demin4–6, ret.Win9–4M15 Monastir, TunisiaWTTHard Carles Hernández4–6, 6–3, 6–2

Doubles: 28 (13 titles, 15 runner-ups) LegendATP Challenger Tour (1–0)ITF Futures/WTT (12–15)Finals by surfaceHard (9–11)Clay (4–3)Grass (0–0)Carpet (0–1)

ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss0–1Turkey F21, IstanbulFuturesHard Sarp Ağabigün Cem Ilkel Efe Yurtacan4–6, 6–7(5–7)Loss0–2Turkey F21, AntalyaFuturesHard Sefa Suluoglu Ricardo Rodriguez Ruan Roelofse2–6, 2–6Loss0–3Turkey F22, BursaFuturesHard Sefa Suluoglu Alessandro Bega Davide Melchiorre6–4, 5–7, [3–10]Loss0–4Turkey F28, AnkaraFuturesClay Tuna Altuna Alessandro Bega Francesco Vilardo4–6, 3–6Win1–4Turkey F35, AntalyaFuturesHard Sarp Ağabigün Michal Konecny Miliaan Niesten6–1, 7–6(7–5)Loss1–5Turkey F52, AntalyaFuturesHard Sarp Ağabigün Tuna Altuna Cem Ilkel6–4, 2–6, [6–10]Loss1–6Turkey F8, AntalyaFuturesHard Tuna Altuna Sarp Ağabigün Marek Michalička6–4, 3–6, [9–11]Loss1–7Turkey F18, AntalyaFuturesHard Sarp Ağabigün Hugo Nys Miķelis Lībietis2–6, 2–6Win2–7Turkey F20, AntalyaFuturesHard Sarp Ağabigün Filipp Kekercheni Christoph Negritu7–5, 6–3Win3–7Netherlands F5, OldenzaalFuturesClay Niels Lootsma Antoine Hoang Benjamin Bonzi6–3, 6–3Win4–7Netherlands F6, RotterdamFuturesClay Benjamin Bonzi Bobbie De Goeijen Glenn Smits6–1, 6–4Win5–7Turkey F11, AntalyaFuturesClay Mauricio Echazú Ilya Vasilyev Victor Baluda7–5, 6–4Loss5–8Turkey F15, AntalyaFuturesClay Sarp Ağabigün Isak Arvidsson Pedro Sakamoto3–6, 3–6Loss5–9Turkey F22, IstanbulFuturesClay Sarp Ağabigün Hugo Dellien Federico Zeballos4–6, 6–4, [3–10]Win6–9Portugal F13, Idanha-a-NovaFuturesHard Anil Yuksel Jonathan Gray Clement Larrière7–5, 6–2Loss6–10Germany F16, HamburgFuturesHard Anil Yuksel Marvin Moeller Dan Added7–6(7–3), 6–7(4–7), [2–10]Loss6–11Greece F9, HeraklionFuturesHard Yaraslav Shyla Marco Bortolotti Miles Seemann6–7(1–7), 6–4, [7–10]Win7–11Greece F10, HeraklionFuturesHard Christopher Díaz Figueroa Marco Bortolotti Lucas Gomez6–2, 6–2Win8–11Turkey F1, AntalyaFuturesHard Jakob Sude Michal Konecny Patrik Rikl7–6(7–4), 2–6, [10–4]Win9–11Turkey F6, AntalyaFuturesHard Cengiz Aksu Omar Giacalone Pietro Rondoni6–3, 3–6, [10–3]Win10–11Turkey F11, AntalyaFuturesClay Cem Ilkel Rafael Matos Marcelo Zormann1–6, 6–4, [10–8]Loss10–12Tunisia F15, DjerbaFuturesHard Juraj Masar Dan Added Hugo Voljacques1–6, 3–6Loss10–13Tunisia F16, DjerbaFuturesHard Domagoj Biljesko Bernardo Saraiva Sem Verbeek3–6, 1–6Loss10–14Tunisia F33, MonastirFuturesHard Florent Diep Ivan Liutarevich Skander Mansouri3–6, 1–6Loss10–15Germany F15, Bad SalzdetfurthFuturesCarpet Hugo Voljacques Mats Rosenkranz Petr Nouza6–4, 3–6, [12–14]Win11–15Germany F16, HamburgFuturesHard Alexander Mannapov Michael Geerts Christopher Heyman6–3, 1–6, [10–7]Win12–15Germany F16, HamburgFuturesHard Alexander Mannapov Michael Geerts Christopher Heyman6–3, 1–6, [10–7]Win13–15Málaga, SpainChallengerHard Dmitry Popko Daniel Cukierman Emilio Gómez6–7(4–7), 6–4, [10–6]

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