Floyd Mayweather has made Manny Pacquiao mad

Floyd Mayweather's demands have made Manny Pacquiao angry ahead of their May 2 megafight, according to Freddie Roach.

The biggest fight in boxing might have happened years ago but for disagreements over drug testing and purse splits, arguments settled late last year before the showdown was finally confirmed last month.

Pacquiao has agreed to abide by Olympic-style testing in the run-up to the fight and underwent the first of his random tests in front of a Filipino television crew on Saturday. But Mayweather's insistence on controlling every pre-fight detail has left a lasting impression on Pacquiao, according to his trainer, who says he has never seen his eight-weight world champion more motivated.

"I can see it in his eyes, in his body movement, his attitude in training that he really wants to win and win decisively," said Roach, quoted on philboxing.com, from Pacquiao's training camp. "Sometimes, I cannot help but think he’s mad at this guy."

"I've never seen him dislike an opponent in my life, but you know what, he doesn't like this guy. He won't say anything bad about him, but he won't say anything good about him either. I think Mayweather is his perfect opponent."

“Manny’s anger could be because everything has to be his (Mayweather's) way. He has a comfort zone, like we couldn’t say anything about the fight until he announced it. He is very very insecure."

Roach repeated his belief that "the whole world will be disappointed" by a Mayweather win, while Pacquiao claims to have identified gaps in his unbeaten opponent's famously impenetrable defence.