Mateusz Bereźnicki
Mateusz Piotr Bereźnicki is a Polish professional boxer. He won a bronze medal at the 2023 European Games, and the 2021 European U22 Boxing Championships. He competed at the [Boxing at the Boxing at the 2024 Summer Olympics – Men's 92 kg|2024 Summer Olympics – Men's 92 kg|2024 Summer Olympics].
Amateur career
Polish National Championships
Bereźnicki won a gold medal at the 2020 Polish National Championships after defeating Tomasz Niedźwiecki in the final. He won his second gold medal the following year after defeating Mateusz Kubiszyn in the final. Bereźnicki won his third consecutive gold medal in 2022 after defeating Kamil Ślendak in the final. After not competing in 2023, he returned in 2024, winning his fourth gold medal after defeating Adam Tutak in the final. Bereźnicki won his fifth gold medal in 2025 after defeating Alexey Sevostyanov in the final.European U22 Boxing Championships
Bereźnicki competed at the 2021 European U22 Boxing Championships in Roseta, Italy. He made it to the semifinals, where lost to Vladimir Uzunyan. Despite the loss, Bereźnicki ended the championships with a bronze medal.He then competed in the 2022 European U22 Boxing Championships in Poreč, Croatia. In the first round, he defeated Vitalii Stalchenko. In the next round, he lost to Jack Marley, eliminating him from medal contention.
2023 European Games
Bereźnicki competed at the 2023 European Games. In the first round, he defeated Pavol Hrivňák. In the Round of 16, he defeated Levente Kiss. In the quarterfinals, he defeated Yan Zak. In the semifinals, he lost to Aziz Abbes Mouhiidine, eliminating him from directly qualifying for the 2024 Summer Olympics. Despite the loss, Bereźnicki ended the tournament with a bronze medal.2024 Summer Olympics
Qualification
Bereźnicki competed in the 2024 World Boxing Olympic Qualification Tournament 1 to qualify for the 2024 Summer Olympics. He started the tournament from the second round, which he defeated Joseph Kostúr to advance. In the third round, he defeated Soheb Bouafia. In the final qualifying bout, he lost to Patrick Brown.Bereźnicki competed in the 2024 World Boxing Olympic Qualification Tournament 2 for a second chance to qualify for the 2024 Summer Olympics. In the first round, he defeated Adrian Paoletti. In the second round, he defeated Peter Abuti Alwanga. In the third round, he defeated Alexander Okafor. In the final round, he defeated Daniel Guzmán to qualify for his first Olympic Tournament.
Olympic Games
In the first round, he faced Jack Marley. Bereźnicki lost the fight 4-1, ending his Olympic tournament early.Professional career
Bereźnicki made his professional debut on November 16, 2024, against Paweł Strykowski. Bereźnicki won the fight via a first-round corner retirement.His next fight came on February 1, 2025, against Twon Smith. This marked Bereźnicki's first fight in the United States. Bereźnicki won the fight via a Unanimous Decision.
His next fight came on May 25, 2025, against Dariusz Skop, this time returning to his native Poland. Bereźnicki won the fight via a Unanimous Decision.
His next fight came on November 22, 2025, against Dmitrii Cosciug. Bereźnicki won the fight via a Unanimous Decision.
Professional boxing record
| No. | Result | Record | Opponent | Type | Round, time | Date | Location | Notes |
| 4 | Win | 4–0 | Dmitrii Cosciug | UD | 4 | 22 Nov 2025 | Hala MOSiR, Chełm, Poland | |
| 3 | Win | 3–0 | Dariusz Skop | UD | 4 | 25 May 2025 | Arena Kalisz, Kalisz, Poland | |
| 2 | Win | 2–0 | Twon Smith | 4 | 1 Feb 2025 | Prudential Center, Newark, New Jersey, U.S. | ||
| 1 | Win | 1–0 | Paweł Strykowski | 1, 3:00 | 16 Nov 2024 | KGHM Arena Ślęza Wrocław, Wrocław, Poland |