Floyd Mayweather Jr. is confident that he will win again in his upcoming rematch against Marcos Maidana on Sept. 13 at the MGM Grand in Las Vegas.

In an interview with BoxingScene, Mayweather insisted that he will have the same fight plan that he followed in their first fight on May 3, saying that he sees no need to make changes because he won convincingly.

Mayweather might have been pushed to the limits as noted by most boxing analysts, but the reigning pound-for-pound king reiterated that Maidana's camp knows that they lost in their first fight clearly.

"I don't have to make any adjustments going into this fight, but he does. I won the fight," Mayweather said. "If I spar against someone and they win three of twelve rounds against me, that's a bad day for me. I am a perfectionist and I set the bar so high. Maidana knows in his heart that he didn't win."

Maidana gave Mayweather a tough fight -- at least tougher than what most fights fans expected -- in their previous match before the unbeaten champion kept his record unblemished with a majority decision win.

Mayweather fulfilled his promise of giving Maidana a rematch, but the 37-year-old champion has been saying that he just agreed to a second fight because the fight fans asked for it -- not because he thinks the 31-year-old Argentine deserves another shot.

The welterweight and light middleweight champion took a swipe at Maidana, saying that the Buenos Aires, Argentina native just demanded for the rematch because of the hefty paycheck that he could get, and not because he thinks he can win.

"I know that if I lost this fight, then I wouldn't take it again. Maidana isn't stupid, the reason why he is trying to fight me again is because he is going to make more money fighting me than anyone else, even though he knows he will lose again," Mayweather said.

Maidana, who is looking to reclaim the WBA welterweight title, responded to Mayweather's tirade, saying that he will let his fist do the talking on the Sept. 13 fight.

"I'm going to shut his mouth. He doesn't respect anything or anyone. He might have money, but he doesn't have respect. He thinks he intimidates me? Nothing intimidates me. His talk can't hurt me, his punches can't hurt me. Come September 13, he'll be the one that's hurt," Maidana said.

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