Václav Sivák (born 27 May 1999) is a Czech professional kickboxer who competes in welterweight division. He is current WAKO-PRO World Light Welterweight Champion.
Biography career Václav Sivák was in Ostrava, Czech Republic grew with in an excluded Romani locality in Ostrava-Vítkovice. Sivák started practicing karate at age 6 however, he was often disqualified for hitting too hard. At age of 11, he transitioned to Muay Thai. At age of 16 he moved to Hamr Gym in Ostrava. Under guidance of his coach Viktor Petrlík he amassed a 94–5 amateur kickboxing record. As a teen, he belonged to local Roma gang but thanks to his father, he got into martial arts.
In 2019 Sivak became first Czech to win a gold medal at senior WAKO World Championships. Sivak faced Lukas Mandinec at XFN Muay Thai Evening X 9 February 2019. He won fight unanimous decision. Sivak extended his winning streak with an extra round decision win Mochamed Machaev at XFN Legends 29 March 2019.
On 19 April 2018, Sivák faced Fang Feida in collaborative event between XFN and Wu Lin Feng. He won fight decision.
Sivák faced Benjamin Horvath at Double Red XFN 14 December 2019. He won fight a first-round knockout, stopping Horvath with a left knee to body.
Sivák faced Ali El saleh at Night of Warriors event 19 December 2020, in his sole fight of year. Sivak won first knockout flooring his opponent with a left hook to body.
On 22 January 2021, it was announced that Sivák would face Bailey Sugden at Oktagon Underground: Last Man Standing on 27 February 2021, in quarterfinals of Oktagon 70 kg tournament. bout was contested at 70 kilograms, 6.5 above Sivák's usual weight. He won fight unanimous decision. Despite winning quarterfinal bout, he was forced to withdraw from tournament due to a leg injury.
On 18 March 2021, Sivák revealed that he would his Road to ONE debut against Marian-Florin Soare at Night of Warriors 17 on 24 April 2021. He won fight a first-round knockout, staggering Soare with a knee to body, before finishing him with a flurry of punches.
Sivák was booked to face Fouad Djebari Fouad Djebari for WAKO Pro World K-1 (-64.5 kg) title, his first major professional title, at Yangames Fight Night 9 on 29 July 2021. He withdrew from bout week before, in order to fully heal from injuries he sustained in his fight with Sugden. title fight was rescheduled for Night of Warriors 4 20 November 2021. Sivák won fight unanimous decision.
Sivák faced Viktor Mikhailov at Fair Fight XVI 12 February 2022. He won fight unanimous decision. Sivák faced Alexis Laugeois at RFA 5 29 October 2022, in his second kickboxing bout of year. He won fight unanimous decision. Sivák faced Vladimír Lengál at Heroes Gate 26 20 November 2022. He won fight unanimous decision.
Sivák faced Patrik Záděra for vacant RFA K-1 -66 kg championship at RFA 7 on 17 December 2022. He won fight unanimous decision. Sivák scored sole knockdown of fight in third round, as he dropped his opponent with a head kick.
Sivák was expected to challenge Kiamran Nabati for Fair Fight featherweight (-65 kg) title at RCC Fair Fight 20 18 February 2023. He withdrew from bout 10 February 2023, after suffering a hand injury.
Sivák made his first RFA K-1 -66 kg title defense against Ruslan Toktharov at RFA 10 13 May 2023. Although Toktharov missed weight 2 kg at official weigh-ins, fight was still contested as a title bout, with stipulation that Toktharov couldn't weigh more than 68 kg on fight night. Sivák won fight a fourth-round technical knockout.
Sivák was expected to his first WAKO Pro World K-1 Light Welterweight (-64.5 kg) title defense against former WAKO K-1 titleholder Eddy Nait Slimani at Yangames Fight Night 29 July 2023. He withdrew from fight July 28, as a pre-fight examination revealed he had two displaced bones in hand he previously injured while preparing for Nabati bout.
Sivák faced Christopher Hopp at RFA 14 2 December 2023. He won fight unanimous decision.
Sivák made his first WAKO-PRO World K-1 Light Welterweight (-64.5 kg) championship defense against Anass Ahmidouch at Lucerna Boxing 15 on 30 December 2023. He won fight unanimous decision.
Sivák faced Michał Królik at XTB KSW Epic: Chalidow Adamek 24 February 2024. He won bout via unanimous decision.
Sivák made his second RFA K-1 -66 kg title defense against Ruslan Toktharov at Adam Król on 16 April 2024. He won fight unanimous decision.
Sivák was expected to face Andrej Kedveš at Gladiators Fight Night 2 18 May 2024. He withdrew from bout with an undisclosed injury 17 May.
Sivák faced Konstantin Stoykov at RFA x IAF: Special Title Night 2 on 28 September 2024. He won fight a second-round technical knockout.
Sivák is scheduled to his third RFA K-1 -66 kg title defense against László Farkas at RFA 16 19 October 2024. Sivák came to weigh in more than 3kg contracted limit. He was stripped of his title, bout would still happen with only Farkas eligible to win belt. Sivák won fight fifth-round knockout.
Sivák faced Patrik Záděra for the vacant RFA K-1 -70 kg championship at RFA 20 on March 14, 2025. Záděra came in 1.1 kg overweight and was ineligible to win the title. Sivák won the fight by a fifth-round knockout.
Sivák faced Johannes Baas at KO-Warriors 2 on June 25, 2025. He won the fight by a closely contested split decision.
Sivák made his first RFA K-1 -70 kg title defense against Angelo Volpe at RFA 24 on September 25, 2025. He retained the title by split decision.
Sivák made his second RFA K-1 -70 kg title defense against Yasuhiro Kido at RFA 29 on March 20, 2026.
Championships achievements Professional World Association of Kickboxing Organizations 2021 WAKO Pro K-1 World Light Welterweight (-64.5 kg) Championship successful title defense Real Fight Arena 2022 RFA K-1 -66 kg Championship One successful title defense 2025 RFA K-1 -70 kg Championship Two successful title defenses
Amateur Czech Federation 6x Czech K-1 & Muay Thai National Champion International Federation of Muaythai Associations 2016 IFMA World Cup in Kazan Junior -63.5 kg 2016 IFMA World Championships Junior -63.5 kg World Association of Kickboxing Organizations 2x WAKO Slovak Open K-1 (2018, 2020) 2x WAKO Czech Open K-1 (2017, 2018) 2015 WAKO European Cup K-1 Youth 2017 WAKO Hungary World Cup K-1 Young Junior -63.5 kg 2017 WAKO European Championships K-1 Older Junior -63.5 kg 2018 WAKO Hungary World Cup K-1 Older Junior -63.5 kg 2018 WAKO European Championships Senior K-1 -63.5 kg 2019 WAKO World Championships Senior K-1 -63.5 kg 2020 WAKO WGP -67 kg Champion World Martial Arts Committee 2019 WMAC World Games K-1 -65 kg
Kickboxing Muay Thai record
|- style="background:#;" | 2026-10-17|| ||align=left| Brandon Fos || RFA 34|| Zilina, Slovakia || || ||
|- style="background:#cfc;" | 2026-03-20|| Win||align=left| Yasuhiro Kido || RFA 29|| Bratislava, Slovakia ||Decision (Unanimous) || 5 ||3:00 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc" | 2025-09-26 || Win ||align=left| Angelo Volpe || RFA 24|| Bratislava, Slovakia|| Decision (Split) || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc" | 2025-06-25 || Win ||align=left| Johannes Baas || KO-Warriors 2|| Prague, Czech Republic|| Decision (Split) || 3 || 3:00
|- style="text-align:center; background:#cfc" | 2025-03-14 || Win ||align=left| Patrik Záděra|| RFA 20 || Bratislava, Slovakia ||Decision (Unanimous) || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc" | 2024-10-19 || Win ||align=left| László Farkas || RFA 18 || Žilina, Slovakia || KO (Left hook to body)|| 5 || 0:55 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc" | 2024-09-28 || Win ||align=left| Konstantin Stoykov || RFA x IAF: Special Title Night 2 || Prague, Czech Republic || TKO (Body shot) || 2 || 2:35
|- style="text-align:center; background:#cfc" | 2024-04-13 ||Win ||align=left| Adam Król || RFA 16 || Opava, Czech Republic ||Decision (Unanimous)|| 5 ||3:00 |- ! style=background:white colspan=9 | |- |- style="background:#cfc;" | 2024-02-24 ||Win ||align=left| Michał Królik || XTB KSW Epic: Chalidow Adamek || Gliwice, Poland || Decision (Unanimous)|| 3 ||3:00 |- style="background:#cfc;" | 2023-12-30 || Win||align=left| Anass Ahmidouch || Lucerna Boxing 15|| Prague, Czech Republic || Decision (Unanimous)|| 5 ||3:00 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc" | 2023-12-02 || Win ||align=left| Christopher Hopp|| RFA 14 || Košice, Czech Republic || Decision (Unanimous)|| 3 || 3:00
|- style="text-align:center; background:#cfc" | 2023-05-13 || Win ||align=left| Ruslan Toktharov|| RFA 10 || Havířov, Czech Republic || TKO (Knee to body) || 4 || |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc" | 2022-12-17 || Win ||align=left| Patrik Záděra || RFA 7 || Prague, Czech Republic || Decision (Unanimous) || 4 || 3:00 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc" | 2022-11-20 || Win ||align=left| Vladimír Lengál || Heroes Gate 26 || Prague, Czech Republic|| Decision (Unanimous) || 3 || 3:00
|- style="text-align:center; background:#cfc" | 2022-10-29 || Win ||align=left| Alexis Laugeois || Real Fight Arena 5 || Brno, Czech Republic|| Decision (Unanimous) || 3 ||3:00
|- style="text-align:center; background:#cfc" | 2022-02-12 || Win ||align=left| Viktor Mikhailov || Fair Fight 16 || Yekaterinburg, Russia || Decision (unanimous) || 3 || 3:00
|- style="text-align:center; background:#cfc;" | 2021-11-20|| Win ||align=left| Fouad Jebbari || Night of Warriors || Liberec, Czech Republic || Decision (unanimous) || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc;" | 2021-04-24|| Win ||align=left| Marian-Florin Soare || Road to ONE 8: Night of Warriors || Prague, Czech Republic || KO (body knee)|| 1 || 1:36
|- style="text-align:center; background:#cfc;" | 2021-02-27 || Win ||align=left| Bailey Sugden || Oktagon Underground - Last Man Standing, Quarter Final || Prague, Czech Republic || Decision (majority) || 3 || 3:00 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc;" | 2020-12-19 || Win ||align=left| Ali El Saleh || Night of Warriors || Prague, Czech Republic || KO (body shot) || 1 || 2:30
|- style="text-align:center; background:#cfc;" | 2019-12-14|| Win ||align=left| Benjamin Horvath || Double Red XFN || Bratislava, Slovakia || KO (body knee) || 1 || 2:39
|- style="text-align:center; background:#cfc;" | 2019-11-16|| Win ||align=left| Deo Phetsangkhat || Battle of Frýdlant 9 || Frýdlant, Czech Republic || Decision || 3 || 3:00
|- style="text-align:center; background:#cfc;" | 2019-09-20|| Win ||align=left| Samuel Hadzima || XFN Legends || Prague, Czech Republic || Decision (unanimous) || 3 || 3:00
|- style="text-align:center; background:#cfc;" | 2019-03-29|| Win ||align=left| Mochamed Machaev || XFN Legends || Prague, Czech Republic || Ext. R Decision || 4 ||3:00
|- style="text-align:center; background:#cfc;" | 2019-02-09|| Win ||align=left| Lukas Mandinec || XFN Muay Thai Evening X || Slovakia || Decision || 3 ||3:00
|- style="text-align:center; background:#cfc;" | 2018-04-19|| Win ||align=left| Fang Feida || WLF: Czech Republic . China || Prague, Czech Republic || Decision || 3 ||3:00
| colspan=9 | Legend:
|- style="text-align:center; background:#cfc;" | 2019-10-25|| Win ||align=left| Tlemissov Chingiskhan || 2019 WAKO World Championships, Final || Sarajevo, Bosnia Herzegovina || Decision (split)|| 3 || 2:00 |- ! style=background:white colspan=9 |
|- style="text-align:center; background:#cfc;" | 2019-10-|| Win ||align=left| Antoine Habash || 2019 WAKO World Championships, Semi Final || Sarajevo, Bosnia Herzegovina || Decision (unanimous) || 3 || 2:00