Marcos Maidana lost in his first fight against Floyd Mayweather Jr., but the Argentine challenger is confident about his chances in their upcoming rematch on Sept. 13 at the MGM Grand Garden Arena in Las Vegas.

Maidana, who absorbed a majority decision loss to Mayweather in their first bout on May 3, said that fighting the reigning pound-for-pound king is not as difficult as it appears.

The 31-year-old managed to put a lot of pressure on Mayweather with his all-out approach in their previous fight before the unbeaten champion took control in the later rounds. Maidana said that he could have won the fight had he avoided committing several mistakes.

"He's not as difficult as he appears. I was able to put him against the ropes and hit him with a lot of punches," Maidana said via BoxingScene. "I had opportunities and I hit him but with the anxiousness I had in wanting to beat him, I made some mistakes and wasn't able to take advantage of some of the little things he did."

Maidana believes that he can score an upset in the rematch. Apart from the new tactics that he is planning to follow, the Buenos Aires, Argentina, native vowed to continue throwing jabs, which stopped Mayweather on his tracks several times in their first showdown.

"I was told by a fighter that had fought him before that Floyd can't avoid the jab. So I remembered that in the fight and I started throwing the jab. And it's true, he couldn't avoid the jab," Maidana said.

But while Maidana is oozing with confidence, Mayweather said that he expects an easier fight because his opponent can't do anything different in the rematch.

"What I can do, what makes me a little different than any other fighter, is I'm well-rounded and very versatile, as far as I can box, I can counterpunch, I can bang, I can do a little bit of everything. That's why I'm at the pinnacle in the sport right now. Can he switch up anything? I don't really think so. I mean, that's just my gut feeling," Mayweather said via MLive.

The 37-year-old Mayweather, who holds an unblemished 46-0 record with 26 knockouts, will put his World Boxing Council welterweight and light middleweight titles on the line along with his World Boxing Association welterweight belt.