Tommy Fury says it's a wrap for Jake Paul's boxing career -- telling TMZ Sports he's going to knock the YouTuber-turned-fighter into retirement when they face off in the ring.
Fury -- lil' bro of boxing champ Tyson Fury -- finally agreed to be Paul's next opponent last week ... after initially saying the offer wasn't worth getting out of bed for.
We caught up with the 22-year-old earlier this week at LAX and had to ask what made him change his mind ... and he tells us the negotiations started to make sense.
"Things are looking up now between that fight," Fury says, "so hopefully we should get it closed in the next few weeks so we'll see."
Of course, Fury believes he's gonna win this bout -- he's a 7-0 light heavyweight going up against Paul, who's also undefeated, but hasn't gone against an actual boxer.
"This is an easy fight for me. A real easy fight," Fury tells us, "I've been doing this job since I was 7."
"He's not a boxer. He's gonna see that when we fight."
Fury added, "I will end his boxing career. There’s no more Jake Paul after we fight. That’s it."
In fact, Fury believes he's doin' Paul a favor ... 'cause at the end of the day, winning this fight doesn't get him anywhere "in boxing terms."
"Beating Jake Paul doesn't get me a world title shot," Fury says, "It doesn't get me any respect to any of the fighters because everyone knows what the fighters think of him."
"All it is, is a good payday, an easy fight."
As for whether Tommy will actually legally change his name to "Tommy Fumbles" if he loses, ya gotta hear his response!!