Here is a list of Ridder's best fights. For a list of Ridder's losses, refer to "Reinier de Ridder Losses".
On January 18, 2025 Reinier de Ridder faced off against Kevin Holland in a middleweight bout at age 34. He was coming in with a record of 19-2 (15), and Holland was 32 years old and with a record of 26-12 (21). Ridder stopped Kevin Holland via submission.
On October 30, 2020 Reinier de Ridder fought Aung La Nsang in a middleweight title fight for La Nsang's ONE Championship title. Ridder was 30 years old and with a record of 13-0 (11), and La Nsang was 35 years old and with a record of 26-10 (24). Ridder stopped Aung La Nsang via 1st-round submission and is crowned the new ONE middleweight champion.
On July 22, 2022 Reinier de Ridder met Vitaly Bigdash in a middleweight (ONE Championship) title defense fight. Ridder was 31 years old and with a record of 16-0 (12), and Bigdash was 37 years old and with a record of 12-2 (10). Ridder stopped Vitaly Bigdash via 1st-round choke-out and successfully defended his title.
On May 3, 2025 Reinier de Ridder faced off against Bo Nickal in a middleweight bout at age 34. He was coming in with a record of 20-2 (16), and Nickal was 29 years old and with a record of 7-0 (6). Ridder stopped Bo Nickal via TKO.
On April 28, 2021 Reinier de Ridder fought Aung La Nsang in a light-heavyweight title fight for La Nsang's ONE Championship title. Ridder was 30 years old and with a record of 14-0 (11), and La Nsang was 35 years old and with a record of 26-11 (24). Ridder won the fight via 5-round unanimous decision and is crowned the new ONE light-heavyweight champion.
On January 25, 2019 Reinier de Ridder faced off against Fan Rong in a light-heavyweight bout at age 28. He was coming in with a record of 10-0 (9), and Rong was 25 years old and with a record of 17-1 (16). Ridder stopped Fan Rong via choke-out.
On November 9, 2024 Reinier de Ridder faced off against Gerald Meerschaert in a middleweight bout at age 34. He was coming in with a record of 18-2 (14), and Meerschaert was 36 years old and with a record of 37-17 (31). Ridder stopped Gerald Meerschaert via submission.
On July 26, 2025 Reinier de Ridder faced off against Robert Whittaker in a middleweight bout at age 34. He was coming in with a record of 21-2 (16), and Whittaker was 34 years old and with a record of 26-8 (15). Ridder won the fight via 5-round split decision.
On February 25, 2022 Reinier de Ridder met Kiamrian Abbasov in a middleweight (ONE Championship) title defense fight. Ridder was 31 years old and with a record of 15-0 (12). Ridder stopped Kiamrian Abbasov via 3rd-round submission and successfully defended his title.
On June 15, 2019 Reinier de Ridder faced off against Gilberto Galvão in a light-heavyweight bout at age 28. He was coming in with a record of 11-0 (10). Ridder stopped Gilberto Galvão via KO.
