Former pro boxer Julius Francis tells TMZ Sports he's down to fight Mike Tyson in a rematch -- 22 years after they first fought -- following the renewed fame he's received after his recent knockout video went viral.
We spoke with the 57-year-old -- who had the internet in a frenzy after he KO'ed a man while working a security guard shift in the UK earlier this month -- and he told us he's now willing to come out of retirement, if the opponent and the price are right.