Harrison, the No. 3 seed, faces sixth-seeded Alexandre Bezerra in the quarterfinals on Friday in New Orleans, and a win would pit him against either No. 2 Lance Palmer or No. 7 Max Coga in the semifinals.

Minutes before midnight, his shirt already having changed from light gray to charcoal from the sweat, Andre Harrison pedaled on the stationary bike.

Bellmore Kickboxing MMA was empty as Friday evolved into Saturday. Just Harrison on the bike and his fiancée sitting on a nearby heavy bag reading a book.

“I should have played checkers,” a tired Harrison said after he completed a 30-minute cardio session of sprints on the bike and treadmill.

This was nothing new for the 30-year-old from Freeport. He works at the gym — some say he lives there — and is of a singular focus as his next bout draws closer.