David Poljak (born 17 May 1996) is a Czech tennis player. Poljak has a career high ATP singles ranking of No. 370 achieved on 21 March 2022 and a career high ATP doubles ranking of No. 124 achieved on 14 September 2026.
Poljak has singles wins over Denis Istomin, Fabian Marozsan, Thomaz Bellucci, Andrey Golubev, Roman Safiullin, Flavio Cobolli and Illya Marchenko and a win in doubles against Andrea Vavassori and Sem Verbeek.
Poljak has won two ATP Challenger doubles titles at the 2026 Tenerife Challenger II with Filip Duda and at the 2026 Internazionali di Tennis del Friuli Venezia Giulia with Alexandru Jecan.
ATP Challenger Tour finals ResultW–L Date Tournament Category Surface Partner Opponents ScoreLoss0–1Nur-Sultan, KazakhstanChallengerHard Andrew Paulson Nam Ji-sung Song Min-kyu2–6, 6–3, [6–10]Loss0–2Troyes, FranceChallengerClay Tim Rühl Mario Mansilla Díez Bruno Pujol Navarro63–7, 62–7Loss0–3Hersonissos, GreeceChallengerHard Max Westphal Alberto Barroso Campos Iñaki Montes de la Torre5–7, 63–7Loss0–4Bergamo, ItalyChallengerHard (i) Tim Rühl Joshua Paris Marcus Willis63–7, 4–6Win1–4Tenerife, SpainChallengerHard Filip Duda Luka Mikrut Tiago Pereira7–60, 6–3Loss1–5Košice, SlovakiaChallengerClay Lukáš Pokorný Miloš Karol Nino Serdarušić7–5, 6–7(4–7), [5–10]Win2–5Jul 2026Cordenons, ItalyChallengerClay Alexandru Jecan Charles Barry Anthony Genov4–6, 7–6(7–4), [10–3]Loss2–6Zug, SwitzerlandChallengerClay Andrew Paulson Thijmen Loof Kaito Uesugi4–6, 2–6Loss2–7Liberec, Czech RepublicChallengerClay Maximilian Neuchrist Iñigo Cervantes Denys Molchanov6–7(7–9), 3–6Win3–7Sion, SwitzerlandChallengerClay Maximilian Neuchrist Murkel Dellien Facundo Mena6–4, 6–4
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