Mike Tyson is confident he would have beaten both Tyson Fury and Anthony Joshua in his prime.
Tyson remains the youngest-ever heavyweight champion having beaten Trevor Berbick to win the world title at the age of 20.
There are now four world titles, currently shared between Britons Fury and Joshua, but Tyson believes he would unify the division were he at his peak today.
"Listen, if you’re asking me if I was 20 years old, yes, there’s no doubt," he said.
"They’re really good fighters and I respect all these skills, it would have been very tough fighting them."
Tyson stopped short, however, of saying he would beat Muhammad Ali had the two fought in the same era.
That fight was recently simulated by the World Boxing Super Series who held an e-version of their popular tournament.
Tyson beat Ali in the final - but the former 'baddest man on the planet' admits the result would have been different in real life.
"I know it’s a fantasy game," he said. "Most likely I would win the fantasy, I wouldn't win the real fight. Ali's the greatest there’s ever been."
Tyson won 50 of his 56 fights but lost three of his last four - including to Lennox Lewis - before retiring in 2005.
His final outing saw him retire after six rounds against Kevin McBride in Washington despite being ahead on two of the three judges' scorecards.
