Radomir OpaÃÂiÃÂ (born June 17, 1997) is a Serbian kickboxer and former taekwondoist who competes in the Heavyweight division.
As of August 2024, he was ranked as the 7th best heavyweight in the world by Combat Press.
OpaÃÂiÃÂ is the son of Serbian refugees from Dalmatia. He was born and grew up in Zemun district, Belgrade. He started Taekwondo at 10 years old. At 14 years old his family moved to Hamilton, Ontario, Canada where he attended Glendale Secondary School and where he took up Kickboxing at a local Gym. Due to his size he was already facing adults at 15 years old in exhibition fights. When he moved back to Serbia he joined the KBKS Gym and competed as an amateur until the age of 18. He won several titles including the 2015 WAKO European Junior Championship.
On October 27, 2016, OpaÃÂiàtook part in his first major professional event when he engaged in the K-1 World GP 2016 âÂÂ95 kg Championship Tournament in Belgrade. He won his quarterfinal by decision against Emmanuel Payet from France before losing by unanimous decision in the semifinals against Fabio Kwasi.
On March 24, 2018, OpaÃÂiàfaced TomÃ¡à ¡ Hron at the Night of Warriors 2018 event. He was defeated by decision.
On February 24, 2019, OpaÃÂiÃÂ took part in an 8-man one night tournament at the Kunlun Fight 80 event. He won his quarter finals against Liu Wei by body shot knockout in the first round before losing by second-round TKO to top ranked heavyweight Roman Kryklia in the semifinals where he was knocked down five times.
OpaÃÂiÃÂ was scheduled in a 4-man Heavyweight Tournament at the Enfusion 86 Road to Abu Dhabi event on June 28, 2019. OpaÃÂiÃÂ won both his semi final against Daniel Galabarov and the final against Nidal Bchiri by first-round knockouts. The tournament win qualified him for the year end Enfusion tournament in Abu Dhabi. On December 6, he was outpointed by Slovakia's Martin Pacas in his semifinal bout.
OpaÃÂiÃÂ was unable to fight in the first half of 2020 due to the COVID-19 pandemic. During this time it was announced he signed with the ONE Championship organization. On December 4, 2020, he faced veteran Errol Zimmerman for his promotional debut at in Singapore. OpaÃÂiÃÂ won the fight by spinning heel kick knockout in the second round.
OpaÃÂiÃÂ was scheduled to face Bruno Susano at on January 22, 2021. He won by second-round technical knockout.
OpaÃÂiÃÂ was scheduled to face Patrick Schmid at on October 15, 2021. OpaÃÂiÃÂ defeated Schmid by second-round technical knockout.
On January 28, 2022, OpaÃÂiàfaced Françesco Xhaja at . He won by second-round knockout, earning him a Performance of the Night bonus and tied the record for most knockouts in ONE Super Series.
OpaÃÂiÃÂ was booked to face the one-time WGP Kickboxing Super Heavyweight champion Guto Inocente at ONE 157 on May 20, 2022. The bout was later postponed, as Inocente tested positive for COVID-19, and was rescheduled for ONE 158 on June 3, 2022. He lost the bout via KO stoppage due to a liver punch in the first round.
OpaÃÂiÃÂ faced Giannis Stoforidis in the ONE Heavyweight Kickboxing World Grand Prix alternate bout at ONE on Prime Video 2 on September 30, 2022. He won the fight by a second-round knockout.
OpaÃÂiÃÂ faced Guto Inocente at ONE Fight Night 11 on June 11, 2023. He knocked Inocenete down once in the first round, with a right hook, en-route to winning the fight by unanimous decision.
OpaÃÂiÃÂ faced Iraj Azizpour at ONE 165 on January 28, 2024. He won the fight by unanimous decision.
OpaÃÂiÃÂ faced Daniel Lentie at SENSHI 22 on June 7, 2024. He won the fight by a second-round knockout.
OpaÃÂiÃÂ faced Cristian Ristea at SENSHI 23 on September 7, 2024. He won the fight by unanimous decision.
After parted way with ONE Championship due to complaints of inactivity. On December 19, 2024, it was announced that OpaÃÂiÃÂ signed with Glory.
He took part in the Glory 99 âÂÂHeavyweight Last Man Standing Tournamentâ where 32 heavyweight fighters competed on April 5, 2025 in Rotterdam, Netherlands. He lost by second round knockout to Nico Pereira Horta.
After this loss, OpaÃÂiÃÂ switched gyms, choosing to train at Hemmer's Gym in The Netherlands. His first fight with Hemmer's was against Ionut Iancu at Glory 103. He won via TKO due to a leg injury in the third round.
OpaÃÂiàfaced Mike Kena in the semifinals of the Last Heavyweight Standing Qualification Round Phase 2 one-night tournament at Glory 104 - Last Heavyweight Standing Qualification Round on October 11, 2025. He won the fight by unanimous decision and advanced the to finals where he faced fellow countryman Miloà ¡ CvjetiÃÂanin. He lost the fight by split decision.
He got married in Dalmatinska Lazarica Serbian Orthodox Church in Croatia on July 28, 2024.
|- bgcolor="" | 2026-04-25 || ||align=left| Colin George || Glory 107 || Rotterdam, Netherlands || || || |- bgcolor="#fbb" | 2025-10-11 || Loss||align=left| Miloà ¡ CvjetiÃÂanin || Glory 104 - Last Heavyweight Standing Qualification Round, Final|| Rotterdam, Netherlands || Decision (Split) ||3 ||3:00 |- ! style=background:white colspan=9 | |- bgcolor="#cfc" | 2025-10-11 || Win||align=left| Mike Kena || Glory 104 - Last Heavyweight Standing Qualification Round, Semifinals || Rotterdam, Netherlands ||Decision (Unanimous) || 3 || 3:00
|- bgcolor="#cfc" | 2025-08-23 || Win||align=left| IonuÃÂ Iancu || Glory 103 - Last Heavyweight Standing Opening Round Phase 2 || Rotterdam, Netherlands || TKO (low kicks) || 3 || 0:25
|- bgcolor="#fbb" | 2025-04-05 || Loss ||align=left| Nico Pereira Horta || Glory 99 - Last Heavyweight Standing Opening Round || Rotterdam, Netherlands || KO (Right cross) || 2 || 2:52
|- style="background:#cfc;" | 2024-09-07 || Win ||align=left| Cristian Ristea || SENSHI 23 || Varna, Bulgaria || Decision (Unanimous) || 3 || 3:00
|- style="background:#cfc;" | 2024-07-06|| Win ||align=left| Daniel Lentie || SENSHI 22 || Varna, Bulgaria || KO (Punches) || 2||1:18
|- style="background:#cfc;" | 2024-01-28|| Win ||align=left| Iraj Azizpour || ONE 165 || Tokyo, Japan || Decision (Unanimous) || 3 ||3:00
|- style="background:#cfc;" | 2023-06-10 || Win ||align=left| Guto Inocente || ONE Fight Night 11 || Bangkok, Thailand || Decision (Unanimous) || 3 ||3:00 |- style="background:#cfc;" | 2022-10-01 || Win||align=left| Giannis Stoforidis || ONE on Prime Video 2 || Kallang, Singapore || KO (Punches) || 2 || 1:52
|- style="background:#fbb;" | 2022-05-20 || Loss || align="left" | Guto Inocente || ONE 158 || Kallang, Singapore || KO (Body punch)|| 1||2:33 |- style="background:#cfc;" | 2022-01-28 || Win || align="left" | Françesco Xhaja || || Kallang, Singapore || TKO (3 knockdown rule)|| 2|| 2:00
|- style="background:#cfc;" | 2021-10-15 || Win || align="left" | Patrick Schmid || || Kallang, Singapore || TKO (knees) || 2 || 1:19
|- style="background:#cfc;" | 2021-01-22|| Win ||align=left| Bruno Susano || || Kallang, Singapore || TKO (punches) || 2 || 1:11
|- style="background:#cfc;" | 2020-12-04 || Win ||align=left| Errol Zimmerman || || Kallang, Singapore || KO (spinning heel kick) || 2|| 1:35
|- style="background:#fbb;" | 2019-12-06 || Loss ||align=left| Martin Pacas|| Enfusion 92, Heavyweight Tournament, Semifinals || Abu Dhabi, United Arab Emirates || Decision (unanimous) || 3 || 3:00
|- style="background:#cfc;" | 2019-06-28|| Win ||align=left| Nidal Bchiri || Enfusion 86 Road to Abu Dhabi, Final || Belgrade, Serbia || KO (punches) || 1|| 1:38 |- ! style=background:white colspan=9 | |- style="background:#cfc;" | 2019-06-28|| Win ||align=left| Daniel Galabarov || Enfusion 86 Road to Abu Dhabi, Semifinals || Belgrade, Serbia || KO (punches) || 1||
|- style="background:#fbb;" | 2019-04-27 || Loss ||align=left| Martin Pacas || Enfusion 83 || à ½ilina, Slovakia || Decision (unanimous) || 3 || 3:00
|- style="background:#fbb;" | 2019-02-24||Loss ||align=left| Roman Kryklia || Kunlun Fight 80 - Heavyweight Tournament, Semifinals || Shanghai, China || TKO (referee stoppage/5 knockdowns) || 2 ||
|- style="background:#cfc;" | 2019-02-24|| Win ||align=left| Liu Wei || Kunlun Fight 80 - Heavyweight Tournament, Quarterfinals || Shanghai, China || KO (body punch) ||1 || 0:43
|- style="background:#cfc;" | 2018-12-01 || Win ||align=left| Mathieu Kongolo || Collision Fighting League 4 || Lazarevac, Serbia || KO (left hook to the body) || 1 || 0:40
|- style="background:#cfc;" | 2018-04-12 || Win ||align=left| Pascal Touré || Collision Fighting League 2 || Serbia || TKO (Punches) || 3 || 2:55
|- style="background:#fbb;" | 2018-03-24 || Loss ||align=left| TomÃ¡à ¡ Hron || Night of Warriors 2018 || Liberec, Czech Republic || Decision || 3 || 3:00
|- style="background:#cfc;" | 2017-09-30 || Win ||align=left| Dimitris Vakakis || Collision Fighting League || Serbia || Decision || 3 ||3:00
|- style="background:#cfc;" | 2017-04-29 || Win ||align=left| Ondà Âej HutnÃÂk || Simply the Best 14 Prague || Prague, Czech Republic || KO (high kick) || 1 ||
|- style="background:#cfc;" | 2017-02-26 || Win ||align=left| Martin Sabo || Warrior Destiny || Weiz, Austria || KO || 2 ||
|- style="background:#cfc;" | 2017-01-29 || Win ||align=left| IonuÃÂ Iancu || Road To W5 || Novi Sad, Serbia || TKO (low kick) || 2 ||
|- style="background:#fbb;" | 2016-10-27 || Loss ||align=left| Fabio Kwasi || K-1 World GP 2016 -95kg Championship Tournament, Semi Finals || Belgrade, Serbia || Decision (unanimous)||3 ||3:00 |- |- style="background:#cfc;" | 2016-10-27 || Win ||align=left| Emmanuel Payet || K-1 World GP 2016 -95kg Championship Tournament, Quarter Finals || Belgrade, Serbia || Decision (unanimous)||3 ||3:00
|- style="background:#cfc;" | 2016-10-08 || Win ||align=left| Martin Sabo || Warriors Destiny || || KO (head kick)||1 ||
|- style="background:#cfc;" | 2016-02-28 || Win ||align=left| Aleksandar BrkiÃÂ || BPN Vol. XVII || Novi Sad, Serbia || KO (high kick) || 3 ||
|-
|- bgcolor="#CCFFCC" | 2015-08-29 || Win || align="left" | Hrvoje Ujevià|| 2015 WAKO European Junior Championships, Final || San Sebastián, Spain || KO (Knee) || || |- ! style=background:white colspan=9 |
|-