Deontay Wilder has declared war on Anthony Joshua after retaining the WBC heavyweight title with a first-round knockout of opponent Bermane Stiverne.
After his exceptional first-round win Wilder said: "I know I am the best. Are you up for the test?
"I've been waiting on that fight for a long time now. I declare war upon you. Do you accept my challenge?"
Wilder knocked late stand-in challenger Stiverne to the canvas early on in the first round, before flooring him again and securing a win with a stream of punches.
The American now has a 39-0 professional record.
This isn't the first time the fighter has expressed an interest in going up against the WBA and IBF heavyweight champ, he previously said: "They are trying to give me a peasant in Whyte. A king doesn't chase the peasants. A king takes kings. I want Joshua. If he doesn't give me the fight we have other plans.
"The world wants Joshua, the world wants Wilder, I want Joshua. Joshua come and see me baby. No more dodging, no more excuses. Make the date, don't wait. Let's see who is the best."
However, Joshua's trainer Robert McCracken has previously said he would personally like to see Joshua fight Kiwi Joseph Parker the current WBO heavyweight champ before Wilder.
But of course, Tyson Fury has also announced that he is keen to make a return to boxing to take on Joshua.
He told Sky Sports: "I've had two years out of the ring. Fat as a pig, hairy as an animal, but still as hungry as a lion.
"You have two years out of the ring and it gives you that va-va-voom to get back in there and bust a few heads.
"Do I need that many warm-ups? I don't think so. Am I a 40-year-old? No, I'm 29. Still got a long time in boxing. I'm just so happy and excited to potentially be a part of one of the biggest fights in British boxing history.
"People say, why do you think it's that? I'm saying it because two unbeaten heavyweights, one unified champion, one lineal champion, both over six foot six tall, both over 18 stone. One nice guy, one bad man - it is what it is. I think the public are going to relish the thoughts of making this fight happen."
Guess we'll just have to wait and see, eh?