ONE featherweight and lightweight champion Martin Nguyen will go after bantamweight titleholder Bibiano Fernandes and his third belt in March.
ONE Championship had a breakout year in 2017 with longtime titleholder Ben Askren retiring undefeated and Martin Nguyen becoming a two-division champion.
Two title fights were announced by ONE Championship CEO / Chairman Chatri Sityodtong on Wednesday.
In an unprecedented move, ONE lightweight and featherweight champion Martin Nguyen will attempt to capture a third title in 2018.
Check out full event fight highlights from ONE: Legends of the World, where Martin Nguyen became the promotion's first dual-division champion.
Martin Nguyen stunned the crowd in Manila, knocking out Eduard Folayang to become ONE Championship's first two-division titleholder.
Martin Nguyen putting friendship aside to make ONE Championship history.
The highly anticipated ONE Featherweight World Title rematch between Marat Gafurov and Martin Nguyen on Aug. 18, 2017, was two years in the making.
Deemed as one of the best bouts of 2016, watch Martin Nguyen take out Li Kai Wen.
November looks set to be the busiest month in ONE Championship history with three super fights booked.
Marat Gafurov had never lost a fight ahead of ONE: Quest for Greatness. That all changed with a powerful Martin Nguyen right hand.
Heading into his champion rematch with Marat Gafurov, Martin Nguyen is a new fighter and believes a changing of the guard is on tap.
Undefeated featherweight champion Marat Gafurov will be defending his belt in the main event of ONE: Quest for Greatness.
Martin Nguyen heads into Saturday's ONE: Quest for Power intending to prove to an entire division that he is a threat.
Aussie Martin Nguyen is looking forward to derailing the Christian Lee bandwagon at ONE: Heroes of the World on Saturday.
Since turning professional last December, ONE Championship featherweight Christian Lee has been one of the busiest fighters in the promotion.
ONE: Global Rivals is set for the Mall of Asia Arena on April 15 and a tenth fight was added to the card on Thursday.