Reinier de Ridder has three losses against two opponents on his MMA record. For a list of Ridder's best fights, refer to "Best fights of Reinier de Ridder".
On October 18, 2025 Reinier de Ridder faced off against Brendan Allen in a middleweight bout at age 35. He was coming in with a record of 21-3 (16), and Allen was 29 years old and with a record of 25-7 (19). Ridder lost the fight via 4th-round TKO.
On March 1, 2024 Reinier de Ridder met Anatoly Malykhin in a middleweight (ONE Championship) title defense fight. Ridder was 33 years old and with a record of 16-2 (12), and Malykhin was 36 years old and with a record of 13-0 (13). Ridder lost the fight via 3rd-round TKO and lost the title.
On December 3, 2022 Reinier de Ridder met Anatoly Malykhin in a light-heavyweight (ONE Championship) title defense fight. Ridder was 32 years old and with a record of 16-1 (12), and Malykhin was 34 years old and with a record of 11-0 (11). Ridder lost the fight via 1st-round KO and lost the title.
