Pacman: Relax, I'm going to beat Mayweather

Manny Pacquiao worried about the punching power of Miguel Cotto. He knew Juan Manuel Marquez was a slick counter puncher and wondered how he would fare against a fighter of the caliber of Oscar De La Hoya.

He has no such worries about Floyd Mayweather Jr. on the eve of boxing's richest fight ever.

"I cannot say he is that difficult an opponent," Pacquiao said on Tuesday in Las Vegas. "My confidence right now is different than the other fights I had. I feel excited, this is it. I have to prove something."