Naoya Inoue successfully defended his WBO super flyweight championship for the third time on Sunday when he defeated Thailand's Petchbarngborn Kokietgym by technical knockout in the 10th round.
Inoue offered a sober assessment of a fight in which he did little for several rounds but probe and test his opponent.
"This was the level I'm at today and I am sorry for that," said the 23-year-old Inoue, who improved to 11-0 with nine wins by knockout.