Those watching Jake Paul vs. Gervonta Davis better keep their cameras ready ... 'cause El Gallo tells TMZ Sports he's knocking out Tank -- and he's hoping it's in one of the most spectacular fashions the sport's ever seen.
The YouTuber-turned-boxer sat down with us recently to break down his upcoming fight with the undefeated Davis ... and check out our interview, Paul is clearly confident he's going to get the win.
In fact, he guaranteed a KO -- promising "I'm going to knock this guy out.