Kacper Żuk (born 21 January 1999) is a former Polish professional tennis player.

Żuk has a career high ATP singles ranking of World No. 162 achieved on 13 September 2021. He also has a career-high ATP doubles ranking of World No. 278 achieved on 9 May 2022.

Żuk has reached ten career singles finals with a record of 11 wins and 3 losses, which includes a 1–2 record in ATP Challenger Tour finals. Additionally, he has reached 21 career doubles finals, with a record of 12 wins and 9 losses all but one occurring at the ITF Futures level.

Tennis career

2020–21: First Challenger title and top 200 Żuk made his ATP debut at the 2020 ATP Cup, where he represented Poland in a singles match, losing to Marin Čilić of team Croatia.

He ended the 2020 season with back-to-back ITF World Tennis Tour titles at Hamburg and Vale do Lobo.

He reached his first Challenger final in March 2021 and in April won his first Challenger title at the 2021 Split Open II in Croatia. As a result, he reached the top 200 on 19 April 2021 and a career-high of No. 162 on 13 September 2021.

2022–23: United Cup debut He played his first match at the 2023 United Cup as the Polish No. 3 male player in the semifinals against Frances Tiafoe and lost in straight sets.

Grand Slam performance timeline

Current through the 2023 US Open qualifying

Singles Tournament202120222023Win %Australian OpenAQ1A0 / 00–0French OpenQ1Q1A0 / 00–0WimbledonQ2Q1A0 / 00–0US OpenQ2AA0 / 00–0Win–loss0–00 / 00–0

ATP Challenger and ITF Futures Finals

Singles: 15 (12 titles, 3 runner-ups) Legend (singles)ATP Challenger Tour (1–2)ITF World Tennis Tour (11–1)Finals by surfaceHard (8–3)Clay (3–0)Grass (0–0)Carpet (1–0)

ResultW–LDateTournamentTierSurfaceOpponentScoreWin1–0M15 Sharm El Sheikh, EgyptWorld Tennis TourHard Pablo Vivero Gonzalez7–6(7–2), 6–3Win2–0M15 Troisdorf, GermanyWorld Tennis TourClay Jeroen Vanneste7–5, 6–1Win3–0M25 Stockholm, SwedenWorld Tennis TourHard (i) Botic van de Zandschulp4–6, 6–4, 6–3Loss3–1M15 Sharm El Sheikh, EgyptWorld Tennis TourHard Pablo Vivero Gonzalez4–6, 6–4, 5–7Win4–1M25 Barnstaple, Great BritainWorld Tennis TourHard (i) Christopher Heyman7–6(7–3), 6–3Win5–1M25 Poznań, PolandWorld Tennis TourClay Dimitar Kuzmanov7–6(8–6), 6–1Win6–1M25 Hamburg, GermanyWorld Tennis TourHard (i) Tseng Chun-hsin6–4, 7–6(7–4)Win7–1M25 Vale do Lobo, PortugalWorld Tennis TourHard Nuno Borges6–4, 6–3Loss7–2Saint Petersburg, RussiaChallengerHard (i) Evgenii Tiurnev 4–6, 2–6Win8–2Split, CroatiaChallengerClay Mathias Bourgue 6–4, 6–2Loss8–3Biel/Bienne, SwitzerlandChallengerHard (i) Jurij Rodionov 6–7(3–7), 4–6Win9–3M25 Tbilisi, GeorgiaWorld Tennis TourHard Aleksandre Metreveli6–2, 6–4Win10–3M25 Falun, SwedenWorld Tennis TourHard (i) Karl Friberg6–3, 6–3Win11–3M25 Sharm El Sheikh, EgyptWorld Tennis TourHard Alastair Gray6–4, 6–4Win12–3M25 Trimbach, SwitzerlandWorld Tennis TourCarpet (i) Beibit Zhukayev6–4, 6–4

Doubles: 21 (12 titles, 10 runner-ups) Legend (singles)ATP Challenger Tour (0–2)ITF World Tennis Tour (12–8)Finals by surfaceHard (5–9)Clay (6–1)Grass (0–0)Carpet (1–0)

ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreWin1–0Poland F3, SopotFuturesClay Piotr Matuszewski Andriej Kapaś Adam Majchrowicz7–6(7–5), 6–3Win2–0Egypt F27, Sharm El SheikhFuturesHard Piotr Matuszewski Antonio Massara Andrea Vavassori6–3, 6–2Win3–0Egypt F34, Sharm El SheikhFuturesHard Piotr Matuszewski Szymon Walków Kamil Gajewski3–6, 6–2, [10–7]Loss3–1Egypt F11, Sharm El SheikhFuturesHard Piotr Matuszewski Gijs Brouwer Jelle Sels5–7, 1–6Win4–1Egypt F27, Sharm El SheikhFuturesHard Piotr Matuszewski Tomas Papik Marek Gengel6–2, 6–2Win5–1Poland F6, KoszalinFuturesClay Jan Zieliński Pawel Cias Michal Dembek6–2, 6–2Win6–1Netherlands F6, HarenFuturesClay Yann Wojcik Stephan Gerritsen Maikel Borg4–6, 6–4, [10–3]Loss6–2Egypt F21, Sharm El SheikhFuturesHard Adam Moundir Marco Brugnerotto David Pérez Sanz6–3, 2–6, [7–10]Loss6–3Egypt F28, Sharm El SheikhFuturesHard Adham Gaber Jordi Muñoz Abreu David Pérez Sanz3–6, 2–6Loss6–4M15 Sharm El Sheikh, EgyptWorld Tennis TourHard David Poljak Hsu Yu Hsiou Shintaro Imai2–6, 0–6Loss6–5M15 Sharm El Sheikh, EgyptWorld Tennis TourHard Daniel Michalski Marat Deviatiarov Jakub Paul3–6, 4–6Loss6–6M15 Tabarka, TunisiaWorld Tennis TourClay Daniel Michalski Barnaby Smith Toby Martin7–5, 1–6, [8–10]Win7–6M15 Wrocław, PolandWorld Tennis TourClay Jan Zieliński Piotr Galus Jan Galka6–4, 6–3Win8–6M15 Antalya, TurkeyWorld Tennis TourClay Jan Zieliński Adil Kalyanpur Kelsey Stevenson3–6, 6–1, [10–8]Loss8–7M25 Stockholm, SwedenWorld Tennis TourHard Jan Zieliński Filip Bergevi Florian Lakat3–6, 6–7(3–7)Win9–7M15 Sharm El Sheikh, EgyptWorld Tennis TourHard Jan Zieliński P Vivero Gonzalez Yu Cheng-Yu6–3, 6–1Loss9–8M15 Sharm El Sheikh, EgyptWorld Tennis TourHard Piotr Matuszewski Sagadat Ayap Kai Lemstra1–6, 6–7(2–7)Win10–8M25 Nussloch, GermanyWorld Tennis TourCarpet Jan Zieliński Johannes Härteis Peter Heller6–3, 6–4Win11–8M25 Barnstaple, Great BritainWorld Tennis TourHard Jan Zieliński Evan Hoyt Luke Johnson6–3, 7–6(7–5)Win12–8M25 Poznań, PolandWorld Tennis TourClay Jan Zieliński Mikolaj Lorens Wojciech Marek7–5, 6–2Loss12–9Pau, FranceChallengerHard (i) Karol Drzewiecki Albano Olivetti David Vega Hernández w/oLoss12–10Cherbourg, FranceChallengerHard (i) Karol Drzewiecki Ivan Liutarevich Vladyslav Manafov 6–7(10–12), 6–7(7–9)

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