Mike Tyson has told Floyd Mayweather Jr that he must change his style if he wants to beat Manny Pacquiao in their fight this year.
Mayweather will put his undefeated record on the line against Pacquiao on May 2 in Las Vegas, but boxing legend Tyson isn't backing him to hold out against his opponent's ferocious offence.
He told reporters: "I thought from the start that Pacquiao is going to win. This guy is perpetual motion. He comes from every angle. He's all energy. Always throwing punches. Never stops.
"Floyd tucks in and picks his shots and he is more accurate. But he doesn't throw anything like Manny's hundred punches a round. It's unlikely he can knock Manny out so if he wants to win he's got to change. Unless he throws more punches he can't win the rounds."
The fight is expected to generate approximately £235m.