Heavyweight contender Andy Ruiz is very confident, as he counts down the days until his showdown with IBF, IBO, WBA, WBO champion Anthony Joshua, who makes his American debut.
The contest takes place on Saturday night, at Madison Square Garden in New York City.
Ruiz is a late replacement for Jarrel Miller, who was pulled from the fight after testing positive for performance enhancing drugs.
Ruiz is a huge underdog in the bout, but believes that he has the necessary tools to expose Joshua.
After watching numerous tapes, Ruiz feels that he's pinpointed the flaws of the unified champion.
"There are weaknesses," Ruiz told Sky Sports. "He is the best right now because he has the belts. But the guys he has fought? I've sparred with them and they wouldn't want to fight with me.
"AJ has a style which will make me look impressive. Yes, he's strong and big. But my style will take away his advantages. This is business. I have nothing bad to say about AJ. I am the challenger and he is the champion. There is respect between me and him - but inside the ring there will be no respect and I will try to win and knock him out."
And Ruiz believes that he can do a lot better than two of the opponents who gave Joshua a lot of trouble.
"Carlos Takam, Dillian Whyte? I thought: 'I can do a lot better than those guys'. I'm an exciting fighter. People look at me and say: 'he's slow, he will get tired'. But I'm a combination fighter. I move, I throw punches, I go in to knock out my opponents," Ruiz said.
"Everybody that fights Joshua has fought scared - they move around and try not to get hit. But I'm not scared of getting hit. I'm here to get hit, and hit back. People like watching me fight because I'm not scared and I bring a fight."