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Zizou Bergs (Dutch pronunciation: [ziˈzu ˈbɛr(ə)xs]; born 3 June 1999) is a Belgian professional tennis player. He has a career-high ATP singles ranking of world No. 39, achieved on 13 October 2025 and a doubles ranking of No. 265, achieved on 27 November 2023. He is currently the No. 1 player from Belgium.
| W | F | SF | QF | | RR | Q# | DNQ | A | NH |
| Tournament | 2021 | 2022 | 2023 | 2024 | 2025 | SR | W–L | Win % | |||||
| Grand Slam tournaments | |||||||||||||
| Australian Open | A | Q1 | 1R | 1R | 1R | 0 / 3 | 0–3 | 0% | |||||
| French Open | A | Q1 | Q2 | 3R | 1R | 0 / 2 | 2–2 | 50% | |||||
| Wimbledon | A | 1R | Q2 | 1R | 1R | 0 / 3 | 0–3 | 0% | |||||
| US Open | Q2 | Q3 | Q1 | 2R | 3R | 0 / 2 | 2–2 | 50% | |||||
| Win–loss | 0–0 | 0–1 | 0–1 | 3–4 | 1–4 | 0 / 10 | 4–10 | 33% | |||||
| ATP Tour Masters 1000 | |||||||||||||
| Indian Wells Masters | A | A | A | A | 2R | 0 / 1 | 1–1 | 50% | |||||
| Miami Open | A | A | 1R | Q2 | 3R | 0 / 2 | 2–2 | 50% | |||||
| Monte-Carlo Masters | A | A | A | A | Q1 | 0 / 0 | 0–0 | – | |||||
| Madrid Open | A | A | A | 1R | 1R | 0 / 2 | 0–2 | 0% | |||||
| Italian Open | A | A | A | 1R | A | 0 / 1 | 0–1 | 0% | |||||
| Canadian Open | A | A | A | A | 1R | 0 / 1 | 0–1 | 0% | |||||
| Cincinnati Masters | A | A | A | Q1 | R2 | 0 / 1 | 1–1 | 50% | |||||
| Shanghai Masters | NH | A | 2R | QF | 0 / 2 | 5–2 | 71% | ||||||
| Paris Masters | A | A | A | 2R | 0 / 1 | 1–1 | 50% | ||||||
| Win–loss | 0–0 | 0–0 | 0–1 | 2–4 | 8–6 | 0 / 11 | 10–11 | 48% | |||||
| Legend |
| Grand Slam (0–0) |
| ATP Masters 1000 (0–0) |
| ATP 500 (0–0) |
| ATP 250 (0–2) |
| Finals by surface |
| Hard (0–1) |
| Clay (0–0) |
| Grass (0–1) |
| Finals by setting |
| Outdoor (0–2) |
| Indoor (0–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Jan 2025 | Auckland Open, New Zealand | ATP 250 | Hard | Gaël Monfils | 3–6, 4–6 |
| Loss | 0–2 | Jun 2025 | Libéma Open, Netherlands | ATP 250 | Grass | Gabriel Diallo | 5–7, 6–7(8–10) |
| Legend |
| ATP Challenger Tour (8–4) |
| Finals by surface |
| Hard (4–2) |
| Clay (3–2) |
| Grass (1–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Win | 1–0 | Mar 2021 | St. Petersburg, Russia | Challenger | Hard (i) | Altuğ Çelikbilek | 6–4, 3–6, 6–4 |
| Win | 2–0 | Mar 2021 | Lille, France | Challenger | Hard (i) | Grégoire Barrère | 4–6, 6–1, 7–6(7–5) |
| Win | 3–0 | Jun 2021 | Almaty, Kazakhstan | Challenger | Clay | Timofey Skatov | 4–6, 6–3, 6–2 |
| Loss | 3–1 | Mar 2022 | Saint-Brieuc, France | Challenger | Hard (i) | Jack Draper | 2–6, 7–5, 4–6 |
| Loss | 3–2 | May 2022 | Troisdorf, Germany | Challenger | Clay | Lukáš Klein | 2–6, 4–6 |
| Win | 4–2 | Jun 2022 | Ilkley, United Kingdom | Challenger | Grass | Jack Sock | 7–6(9–7), 2–6, 7–6(8–6) |
| Loss | 4–3 | Aug 2022 | Manacor, Spain | Challenger | Hard | Luca Nardi | 6–7(2–7), 6–3, 5–7 |
| Win | 5–3 | Apr 2023 | Tallahassee, USA | Challenger | Clay (green) | Wu Tung-lin | 7–5, 6–2 |
| Win | 6–3 | Nov 2023 | Drummondville, Canada | Challenger | Hard (i) | James Duckworth | 6–4, 7–5 |
| Win | 7–3 | Nov 2023 | Yokkaichi, Japan | Challenger | Hard | Michael Mmoh | 6–2, 7–6(7–2) |
| Loss | 7–4 | Apr 2024 | Sarasota, USA | Challenger | Clay (green) | Thanasi Kokkinakis | 3–6, 6–1, 0–6 |
| Win | 8–4 | Apr 2024 | Tallahassee, USA (2) | Challenger | Clay (green) | Mitchell Krueger | 6–4, 7–6(11–9) |
| Legend |
| ATP Challenger Tour (1–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Mar 2023 | Lugano, Switzerland | Challenger | Hard (i) | David Pel | Constantin Frantzen Hendrik Jebens | 6–2, 7–6(8–6) |
| Legend |
| ITF Futures/WTT (4–4) |
| Finals by surface |
| Hard (3–2) |
| Clay (1–2) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Win | 1–0 | Jan 2018 | Turkey F2, Antalya | Futures | Hard | Dimitar Kuzmanov | 6–3, 6–4 |
| Win | 2–0 | May 2018 | Poland F1, Wisła | Futures | Clay | Michael Vrbenský | 3–6, 6–1, 6–2 |
| Loss | 2–1 | Jul 2018 | Belgium F2, Arlon | Futures | Clay | Juan Pablo Varillas | 6–7(6–8), 6–4, 1–6 |
| Loss | 2–2 | Jul 2018 | Belgium F5, Duinbergen | Futures | Clay | Jeroen Vanneste | 6–7(2–7), 3–6 |
| Win | 3–2 | Mar 2019 | M15 Doha, Qatar | WTT | Hard | Adrian Obert | 6–4, 6–1 |
| Loss | 3–3 | Jan 2020 | M15 Monastir, Tunisia | WTT | Hard | Nuno Borges | 4–6, 6–7(6–8) |
| Loss | 3–4 | Feb 2020 | M15 Heraklion, Greece | WTT | Hard | Clement Geens | 6–3, 4–6, 1–6 |
| Win | 4–4 | Nov 2020 | M15 Bratislava, Slovakia | WTT | Hard (i) | Bogdan Bobrov | 6–4, 6–2 |
| Legend |
| ITF Futures/WTT (4–4) |
| Finals by surface |
| Hard (3–2) |
| Clay (1–2) |
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Loss | 0–1 | Mar 2018 | Qatar F1, Doha | Futures | Hard | Scott Griekspoor | Jonas Merckx Fred Simonsson | 7–6(7–3), 3–6, [4–10] |
| Win | 1–1 | Mar 2018 | Qatar F2, Doha | Futures | Hard | Fred Simonsson | Matěj Vocel Marek Gengel | 6–4, 3–6, [10–6] |
| Loss | 1–2 | Jul 2018 | Italy F12, Reggio Emilia | Futures | Clay | Maxime Tabatruong | Tuna Altuna Alexandar Lazov | 4–6, 2–6 |
| Win | 2–2 | Mar 2019 | M15 Doha, Qatar | WTT | Hard | Geoffrey Blancaneaux | Arnaud Bovy Jesper de Jong | 6–2, 6–4 |
| Win | 3–2 | Aug 2019 | M15 Koksijde, Belgium | WTT | Clay | Dan Added | Romain Barbosa Arnaud Bovy | 6–4, 3–6, [10–3] |
| Loss | 3–3 | Oct 2019 | M15 Benicarló, Spain | WTT | Clay | Tiago Cação | Benjamín Winter López Pablo Llamas Ruiz | 3–6, 4–6 |
| Win | 4–3 | Nov 2019 | M15 Monastir, Tunisia | WTT | Clay | Francesco Vilardo | Aziz Dougaz Benjamin Lock | 6–3, 6–4 |
| Loss | 4–4 | Dec 2019 | M15 Doha, Qatar | WTT | Hard | Zura Tkemaladze | Simon Freund Jonathan Mridha | 1–6, 0–6 |
| Season | 2025 | Total |
| Wins | 1 | 1 |
| # | Player | Rk | Event | Surface | Rd | Score | Rk | Ref |
| 2025 | ||||||||
| 1. | Andrey Rublev | 9 | Miami Open, United States | Hard | 2R | 7–5, 6–4 | 51 | |