Korean challenger Ye Joon Kim is a huge underdog as he steps in as a late replacement to take on the pound-for-pound phenomenon Naoya Inoue.

Naoya Inoue, ESPN's No. 3 pound-for-pound boxer, will help usher in the 2025 title fight slate with his third defense of the undisputed 122-pound championship early Friday in Tokyo (ESPN+, 4:15 a.m. ET).

The new year has a growing number of events set for the first few months. Many of the sport's biggest names already have fights on the 2025 calendar, including several members of the pound-for-pound elite.

Naoya Inoue is set to defend his undisputed world titles again this week, as Ye Joon Kim steps in for the injured Sam Goodman. Inoue, a four-division champion who has been undisputed at two weights, was due to box Goodman in December – in the Japanese superstar’s third defence of his super-bantamweight belts.