Floyd Mayweather Jr. is the latest name to offer their coaching services to Anthony Joshua ahead of a rematch with unified world heavyweight champion Oleksandr Usyk.
Speaking ahead of Gervonta 'Tank' Davis' fight with Isaac Cruz this Sunday, Mayweather claimed that all great amateur coaches don't make great trainers in the pro ranks.
"I told him from the beginning, I came on the record from the beginning, I told him to come and I could teach him some pointers," Mayweather told reporters in Los Angeles.
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"A lot of the time, this is just my take, the same coach you had as an amateur doesn’t always make you a great professional.
"Some guys are great at amateur coaching and some guys are great at professional coaching, and even my dad was the best at professional."
The 44-year-old was ringside at the Tottenham Hotspur Stadium last September and revealed some advice he gave to the Olympic gold medalist before his losses to Andy Ruiz Jr. and now Usyk.
"I feel like Anthony Joshua, they’re going to different coaches and saying ‘this coach is going to work with him'.
"But I told him at the beginning when he was undefeated ‘you’ve got some things you need to tweak because if you don’t then you may come up short’."