WBC heavyweight champion Deontay Wilder is no fan of Floyd Mayweather.
Wilder has been speaking out against Mayweather in the last week or so - after Mayweather made certain statements during Wilder's recent world title defense against Tyson Fury.
Mayweather was ringside at Staples Center on December 1, and stated during a televised interview on Showtime Pay-Per-View - that he scored the first five rounds in favor of Fury - and felt Wilder was on his way to losing the fight. The contest would end in a controversial twelve round split draw.
But Wilder has countered back - calling Mayweather a "hater" who never wants any fighter to exceed his accomplishments in the sport.
Mayweather, 41-years-old, retired from boxing in August of 2017.
Wilder believes Mayweather has mishandled is entire stable of fighters within the Mayweather Promotions banner.
And several of the boxers that Mayweather promotes have publicly complained that Mayweather was either holding them back or stalling their careers. Several fighters have left Mayweather and signed on with other promoters.
"Certain things that go on, they just don't bother me. But certain things I just don't understand though, especially when dealing with him. Over and time again, you see him don't want no one to be bigger than him, make it past him, and you even see that with his own fighters," Wilder told Sports Illustrated.
"He has tremendous fighters in his stable, but how many guys he put out there as superstars. Even at press conferences when he's promoting his fighters - he's always mentioning himself. I don't think he could do nothing without mentioning himself.
"When guys gets to a certain stage [in Mayweather Promotions], that's it... they only get to a certain stage, because he don't let them progress and grow like they should, because he wants the center of attention. And it shouldn't be like that. Boxing should be so much better with the power that he draw and that he has. It's not all about yourself all the time. You have a lot of fighters who are great themselves.... they should be promoted, they should be advertised. It's not just about you, you, you.
"And I tell all of these former champions, if do it right the first time you will never be forgotten. No single man can do it forever. There will always be that next great person to come up and do better things than you, because technology changes as the years go on. That's the issue that he has... it's just he and himself and that's it, and it shouldn't be like that."