As expected, Angela Lee and Ben Askren walked out of ONE Championship 55: Dynasty of Heroes still champions in the Asian MMA promotion.

Lee locked in an Anaconda choke early in the second round on Istela Nunes to retain her atomweight title. The 20-year-old is unbeaten in her career.

Askren, meanwhile, submitted Agilan Thani with a first round arm-triangle choke to remain welterweight champion.

Following the win, Askren called out Vitaly Bigdash for a meeting of titleholders this August. Bigdash is the reigning middleweight champion.

Garry Tonon submitted Shinya Aoki in a grappling match, while former champion Dejdamrong Sor Amnuaysirichoke knocked out Adrian Matheis.

Angela Lee def. Istela Nunes via submission (Anaconda choke) at 2:18 of Round 2 to remain ONE female atomweight champion

Ben Askren def. Agilan Thani via submission (arm-triangle choke) at 2:20 of Round 1 to remain ONE welterweight champion

Zebaztian Kadestam def. Luis Santos via KO (knees to the head on the ground) at 2:18 of Round 3

Garry Tonon def. Shinya Aoki via submission (heel hook) at 7:47 of Round 1 in grappling super-match

Dejdamrong Sor Amnuaysirichoke def. Adrian Matheis via KO (strike) at 4:26 of Round 1

Geje Eustaquio def. Anatpong Bunrad via split decision

Amir Khan def. Rajinder Singh Meena via submission (punches) at 1:29 of Round 1