Floyd Mayweather Jr is "destroying" his sparring partners in training according to his uncle Jeff Mayweather.

The undefeated fighter is preparing for his pound-for-pound fight with Manny Pacquiao in May, where he will put his 47-0 record on the line.

Mayweather's uncle told MLive: "The kids, early in camp, they don't care that he's Floyd Mayweather. They want to prove something. They've proved something, all right. They're getting destroyed. He's annihilating everybody. He's a beast. This isn't the same old Floyd."

Mayweather's old rival Zab Judah has been helping him get ready for Pacquiao, but he has also suffered at the hands of the five-division world champion.

Mayweather added: "Everybody was just hyped because they thought Judah was going to be something different, but Judah was worse than the other guys.

"It seemed like Floyd had something personal against him. He beat the **** out of him. So then he quit, he let Judah off the hook, because Judah's got a fight coming up and he messed his eye up."

Mayweather and Pacquiao meet on May 2.