The promotion broke the news on Twitter just now:
???? WORLD CHAMPIONS COLLIDE ????
Aung La N Sang will defend his light heavyweight crown against undefeated middleweight kingpin Reinier de Ridder in the main event of ONE on TNT IV!???? @AungLANsang @tntdrama @BleacherReport @BR_MMA @brlive #WeAreONE #ONEChampionship #ONEonTNT4 pic.twitter.com/F0QjXIlvPg
— ONE Championship (@ONEChampionship) April 24, 2021
La Nsang (26-11-0-1)Â is the reigning light heavyweight champion while de Ridder (13-0) holds the middleweight belt. The two men met at ONE: ‘Inside the Matrix’ last year with the Dutchman prevailing by way of first round submission.
La Nsang had originally been training for a middleweight non title fight with Bigdash. It is not clear whether De Ridder already had a fight booked next week.
As previously announced Eddie Alvarez will face Ok Rae Yoon at ONE on TNT Part IV next week. The Korean earned a shot at the former UFC and Bellator lightweight champion with a win over Marat Gafurov this morning.
Oumar Kane has been matched with Kirill Grishenko in a heavyweight fight. Also on the card isÂ a strawweight Muay Thai bout pitting Jackie Buntan against Ekaterina Vandaryeva. The American is coming off an impressive stoppage win over Wondergirl Fairtex at ONE: ‘Fists of Fury’.