ONE Fight Night 31: Kongthoranee vs. Nong-O 2

If your enemy refuses to be humbled... Destroy him. Accompanied by his brother Kurt, American kickboxing champion Eric Sloane, arrives in Thailand to defeat the Eastern warriors at their own sport. His opponent: ruthless fighter and Thai champion, Tong Po. Tong not only defeats Eric, he paralyzes him for life. Crazed with anger, Kurt vows revenge.

Russian inmate Boyka, now severely hobbled by the knee injury suffered at the end of Undisputed 2. No longer the feared prison fighter he was, he has declined so far that he is now good only for cleaning toilets. But when a new prison fight tournament begins - an international affair, matching the best fighters from prisons around the globe, enticing them with the promise of freedom for the winner - Boyka must reclaim his dignity and fight for his position in the tournament.

Picking up after the events of Never Back Down 2, former MMA champion Case Walker is on the comeback trail to become champion once again.

Monroe Hutchens is the heavyweight champion of Sweetwater, a maximum security prison. He was convicted to a life sentence due to a passionate crime. Iceman Chambers is the heavyweight champion, who lost his title due to a rape conviction to ten years in Sweetwater. When these two giants collide in the same prison, they fight against each other disputing who is the real champion.

Four fighters from different backgrounds come together to train under an ex MMA rising star and then ultimately have to fight each other and the traitor in their midst.

Raised as a slave, Danny is used to fighting for his survival. In fact, his "master," Bart, thinks of him as a pet and goes as far as leashing him with a collar so they can make money in fight clubs, where Danny is the main contender. When Bart's crew is in a car accident, Danny escapes and meets a blind, kindhearted piano tuner who takes him in and uses music to free the fighter's long-buried heart.

An American Army Major goes AWOL to Hong Kong for an outlawed martial arts contest called the Kumite.

Small-town boy Shawn MacArthur has come to New York City with nothing. Barely earning a living selling counterfeit goods on the streets, his luck changes when scam artist Harvey Boarden sees that he has a natural talent for streetfighting. When Harvey offers Shawn help at making the real cash, the two form an uneasy partnership.

Ghang-gheng, the ancient winner-take-all competition in which the deadliest fighters from around the world employ the most spectacular feats of martial arts skills ever displayed in order to win the prized Golden Dragon. But fighting prowess alone will not be enough for Chris to triumph over such daunting foes.

Philo takes part in a bare knuckle fight – as he does – to make more money than he can earn from his car repair business. He decides to retire, but when the Mafia come along and arrange another fight, he's pushed into it. A motorcycle gang and an orangutan called Clyde all add to the 'fun'.

A blind Vietnam vet, trained as a swordfighter, comes to America and helps to rescue the son of a fellow soldier.

The life of boxer Jake LaMotta, whose violence and temper that led him to the top in the ring destroyed his life outside of it.