Sergey Kovalev is the latest pro fighter who wants a piece of Jake Paul ... the ex-boxing champ tells TMZ Sports he's down to fight the YouTuber after his next scheduled match.
"Fight with Jake Paul? I'm ready," the 39-year-old former light heavyweight champion said. "And I will knock him out."
Paul has insisted he wants somebody with a name brand for his next bout -- and while Sergey might not have the biggest social media following, he certainly has the resume Paul is looking for.
"Krusher" is 34-4-1 in his 39 career fights -- and has a win over boxing legend Bernard Hopkins on his resume.