Oleksandr Usyk -- one of the best boxers in the world -- just used his limited English skills to make a BIG challenge to Deontay Wilder, saying he wants to fight Wilder NOW.
If you don't know Usyk yet, you will ... he's undefeated, one of the top pound-for-pound fighters in the world, and was the undisputed (held ALL the belts) cruiserweight champion.
He's moved up to heavyweight now ... and when we got him out at LAX, it's clear he doesn't want to waste time making a mark in his new division because when we asked him who he wanted to fight, he said one thing.