Japanese phenom Naoya Inoue and legendary fighter Nonito Donaire will square off in the World Boxing Super Series bantamweight tournament final at Saitama Super Arena on Thursday night.

The two will rumble with the big Muhammad Ali Trophy at stake. But for the 26-year-old Inoue, who is heavily favored to win, the bout might be about cementing his legacy and best-in-business label.

Even Donaire, who has captured world titles in five different weight divisions, admittted that Inoue is on another level.