Klidson Abreu has six losses against six opponents on his MMA record. For a list of Abreu's best fights, refer to "Best fights of Klidson Abreu".
On December 14, 2024 Klidson Abreu faced off against Mukhamad Vakhaev in a heavyweight bout at age 31. He was coming in with a record of 16-6 (14). Abreu lost the fight via 3-round unanimous decision.
On June 25, 2021 Klidson Abreu faced off against Jamelle Jones in a heavyweight bout at age 28. He was coming in with a record of 15-5 (14). Abreu lost the fight via 1st-round KO.
On November 9, 2019 Klidson Abreu faced off against Shamil Gamzatov in a heavyweight bout at age 26. He was coming in with a record of 15-4 (14), and Gamzatov was 29 years old and with a record of 13-0 (10). Abreu lost the fight via 3-round split decision.
On February 23, 2019 Klidson Abreu faced off against Magomed Ankalaev in a heavyweight bout at age 26. He was coming in with a record of 14-3 (14), and Ankalaev was 26 years old and with a record of 9-1 (5). Abreu lost the fight via 3-round unanimous decision.
On May 21, 2016 Klidson Abreu fought Bruno Cappelozza in a light-heavyweight title fight for the Jungle Fight Championship title. Abreu was 23 years old and with a record of 8-2 (8), and Cappelozza was 27 years old and with a record of 7-4 (7). Abreu lost the fight via 3rd-round TKO.
On December 13, 2014 Klidson Abreu faced off against Peterson Leite in a heavyweight bout at age 21. He was coming in with a record of 6-1 (6). Abreu lost the fight via 3rd-round TKO.