Csemez started boxing at the age of 12 when a boxing gym, KO Box Club, was opened up in
Galanta near his village by legendary boxer and former world
lightweight title challenger
Tomáš Kovács. Although he had also showed interest in
football and
judo, he began personally training under Kovács soon thereafter. In 2015, he won a gold medal at the Julius Torma Youth Memorial in
Prague, and was presented an award by the
Czech Olympic Committee for his performance. The following week he placed first in the
welterweight event at the Slovak National Youth Championships, and was subsequently given the most technical boxer award. At the 2016 European Youth Championships in
Russia that summer, he won three matches before losing a decision to Englishman
Harris Akbar in the semi-finals, taking home a bronze medal. For this achievement he was officially recognized by the president of the Slovak Boxing Federation Peter Bodoki, along with national teammates Filip Meszáros and Dávid Michálek. Csemez began his campaign at that year's
World Youth Championships, also in Russia, with a controversial decision victory over medal favorite Brett McGinty. He was eliminated by Isami Mesa of Cuba in the next round. He closed out the year by moving up to
middleweight and competing at the National Championships, where he won a gold medal in the senior division. He was also named the co-Slovak boxer of the year by the National Sports Center (NŠC), a recognition he received the following year as well. In 2017, at his new weight class, he boxed at the European U-22 Championships in
Romania, but lost his second fight to former European Youth champion
Oleksandr Khyzhniak. He decisioned two fighters before losing to two-time Olympian
Zoltán Harcsa in the quarterfinals of the
European Championships in
Ukraine. This qualified him for the
World Championships in
Hamburg at the age of 19; he exited with another second-round loss to Oleksandr Khyzhniak. After winning a tournament in
Budapest in October 2017, Csemez was involved in a serious car accident that broke two of his
cervical vertebrae and kept him out of the ring for eight months. He was knocked out by Andrej Merzlyakov in the first round of the prestigious
Chemistry Cup in
Germany in June 2018, then lost by referee stoppage to Nicoleto Grdovič at an international tournament in Slovakia in what was his
light heavyweight debut. After this rough return, he then won a gold medal in the middleweight event at the
European Union Championships in November, winning all four bouts by
unanimous decision. His year ended with his second gold medal at the national championships in December. Csemez was scheduled to compete at the 2019 European U-22 Championships in
Russia, but failed a medical exam that kept him out of the ring and awarded his opponent a
walkover victory. However a few weeks later he won a gold medal at the second Euro Cup in
Bijeljina,
Bosnia and Herzegovina in his return to light heavyweight, and was given the best boxer award. Back at
middleweight, he won a bronze at the
2019 European Games, which doubled as that year's European Championships. He lost his semi-final bout to rival Oleksandr Khyzhniak – his third defeat to Khyzhniak in as many match-ups. He then had an early exit at the
World Championships, losing in his second fight. In an attempt to qualify for
Tokyo 2020 he competed at the
2020 European Olympic Qualification Tournament in
London. He defeated Ryszard Lewicki in the opening round and was scheduled to face Miguel Cuadrado of Spain next, but the competition was postponed after three days due to the
COVID-19 pandemic. Returning from England he tested positive for the virus, becoming the first Slovak athlete to do so, and had to go into quarantine with the entire Slovak team.
Amateur results •
2013 Junior National Championships in
Giraltovce, Slovakia (flyweight) • Lost to Juraj Didi 1–4 •
2013 Youth National Championships in
Nové Mesto nad Váhom, Slovakia (flyweight) • Lost to Filip Meszaros 0–5 •
2014 Olympic Hopes Junior Tournament in
Komárno, Slovakia (lightweight) • Defeated Szilard Laszlo (Hungary) 2–1 • Defeated Osvaldas Juskevicius (Lithuania) 3–0 •
2014 North Czech Cup in
Ústí nad Labem, Czech Republic (light welterweight) • Lost to Eryk Apresyan (Poland) 1–2 • Defeated Richard Olah (Hungary) 2–1 •
2014 European Junior Championships in
Anapa, Russia (light welterweight) • Lost to Artur Mamberger (Germany) 0–2 •
2015 Dan Pozniak Youth Cup in
Vilnius, Lithuania (welterweight) • Defeated Saimonas Banys (Lithuania) TKOI2 • Defeated Nikita Lekunovich (Belarus) 2–1 • Lost to Sebastian Wiktorzak (Poland) 0–3 •
2015 Olympic Hopes Tournament in
Galanta, Slovakia (welterweight) • Defeated Mihael Jugovic (Croatia) 3–0 • Lost to Laszlo Kozak (Hungary) •
2015 Julius Torma Youth Memorial in
Prague, Czech Republic (welterweight) • Defeated Sebastian Wiktorzak (Poland) 3–0 • Defeated Saimonas Banys (Lithuania) 3–0 • Defeated Marcel Rumpler (Austria) 3–0 •
2015 Youth National Championships in
Nitra, Slovakia (welterweight) • Defeated Daniel Ondrejka TKO3 • Defeated Tomáš Vago 3–0 •
2015 European Youth Championships in
Kołobrzeg, Poland (welterweight) • Defeated Yunus Emre Batman (Turkey) 3–0 • Lost to Bibert Tumenov (Russia) TKO2 •
2016 Emil Zhechev Memorial in
Sofia, Bulgaria (welterweight) • Defeated Nikki Moeller Nielsen (Denmark) 3–0 • Defeated Asat Bozmov (Bulgaria) 3–0 • Lost to Josip Gecevic (Croatia) 0–3 •
2016 Julius Torma Youth Memorial in Prague, Czech Republic (welterweight) • Defeated Viorel Ficiu (Romania) 3–0 • Defeated Michal Chludil (Czech Republic) 3–0 • Defeated Laszl Kozák (Hungary) 3–0 •
2016 European Youth Championships in Anapa, Russia (welterweight) • Defeated Djordje Bujisic (Serbia) 3–0 • Defeated Daniel Levin (Israel) 3–0 • Defeated Konstantin Kostenko (Ukraine) 3–0 • Lost to Harris Akbar (England) 0–3 •
2016 Youth World Championships in
Saint Petersburg, Russia (welterweight) • Defeated Brett McGinty (Ireland) 3–2 • Lost to Isami Mesa (Cuba) 1–4 •
2016 National Championships in Nitra, Slovakia (middleweight) • Defeated Dominik Dolinaj 3–0 •
2017 Istvan Bocskai Memorial in
Debrecen, Hungary (middleweight) • Defeated Viktor Árpád (Hungary) 5–0 • Lost to Birol Aygun (Turkey) 2–3 •
2017 European U-22 Championships in
Brăila, Romania (middleweight) • Defeated Viktor Árpád (Hungary) AB3 • Lost to
Oleksandr Khyzhniak (Ukraine) AB3 •
2017 European Championships in
Kharkiv, Ukraine (middleweight) • Defeated Andreas Kokkinos (Cyprus) 5–0 • Defeated Vitaliy Bondarenko (Belarus) 5–0 • Lost to
Zoltán Harcsa (Hungary) 0–5 •
2017 World Championships in
Hamburg, Germany (
middleweight) • Defeated Lee Dong-Jin (South Korea) 5–0 • Lost to
Oleksandr Khyzhniak (Ukraine) 0–4 •
2017 Istvan Szechenyi Memorial in
Budapest, Hungary (middleweight) • Defeated Viktor Árpád (Hungary) 5–0 • Defeated Isaac Oroyovwe (Hungary) 5–0 •
2018 Chemistry Cup in
Halle, Germany (middleweight) • Lost Andrej Merzlyakov (Germany) KO2 •
2018 Grand Prix in Nitra, Slovakia (light heavyweight) • Lost to Nicoleto Grdovič (Croatia) •
2018 European Union Championships in
Valladolid, Spain (middleweight) • Defeated Muhammad Abdilrasoon (Finland) 5–0 • Defeated Bengoro Bamba (France) 5–0 • Defeated Victor Corobcevschii (Moldova) 5–0 • Defeated Carl Fail (England) 5–0 •
2018 National Championships in Nitra, Slovakia (middleweight) • Defeated Adrian Hodasi 5–0 • Defeated Lukas Kormancik 5–0 •
2019 Euro Cup in
Bijeljina, Bosnia and Herzegovina (light heavyweight) • Defeated Kalamaras Polyneikis (Greece) 3–0 • Defeated Tayson Alaoma (Italy) 3–0 • Defeated Radenko Tomić (Bosnia and Herzegovina) ABD3 •
2019 European Games in
Minsk, Belarus (
middleweight) • Defeated Arthur Beck (Germany) 3–2 • Defeated Victor Carapcevschi (Moldova) 3–2 • Defeated Miguel Cuadrado (Spain) 4–1 • Lost to
Oleksandr Khyzhniak (Ukraine) RSC2 •
2019 World Championships in
Yekaterinburg, Russia (
middleweight) • Defeated Serhat Güler (Turkey) 4–1 • Lost to Arman Darchinyan (Armenia) 0–5 •
2020 European Olympic Qualification Tournament in
London, England (
middleweight) • Defeated Ryszard Lewicki (Poland) 5–0 •
Tournament postponed due to COVID-19 pandemic, scheduled to face Miguel Cuadrado ==Personal life==