Argentine Marcos Maidana knows gaining victory over Mayweather will be the biggest scalp of all despite the fact that both Maidana’s WBA welterweight title and the undefeated Michigan magician’s WBC belt are on the line.

The explosive 30-year-old, with 31 knockouts in his 35 wins, is adamant he will shock the world, causing the biggest upset since James ‘Buster’ Douglas’ overcame Mike Tyson 24 years ago, when the duo clash at the MGM Grand in Las Vegas on May 3.

“I am a champion and I am ready to fight for my title. Most importantly, I am preparing to beat Mayweather. The last thing that I'm worried about is my title. I want to just train and beat Mayweather,” said Maidana, whose fight is live on BoxNation.

“This is the most important part of my career. The fight with Adrien Broner gave me a lot of exposure, but this fight itself is the biggest fight of my career and it would be a tremendous upset and that's what I'm training for, to upset the world and to do it for my country. It would be huge for my country,” he said.

Going into the fight Maidana is regarded as the underdog, yet, against Broner last December he was in the same position before victory left the man tipped as the next star of boxing truly humbled.

And again, the Santa Fe assassin insists his role as the dark horse only makes him more determined to succeed.

“It doesn't bother me at all [what people say],” said Maidana. “What motivates me is that if I win, I'm going to beat the best in the world and that's what motivates me. I'm going to go out to win it. If others haven't been able to do it, I'm training to do it. I'm training to be the first one to do it,” he said.

His defiant, don’t-care attitude, which has become so synonymous with him, is backed up by his 2012 Trainer of the Year, Robert Garcia, who believes that Mayweather has never shared the ring with a fighter as ferocious as the man dubbed ‘El Chino’.

“Against Floyd, those that have tried and come forward, they have failed, but the fact is that Floyd has never faced somebody with the power and the heart, the determination that Chino has. This is a fighter who doesn't worry about anything,” said Garcia.

“He's not worrying about; I'm fighting the best pound-for-pound in the world or the best fighter in history. He's not worried about that. He gets ready to fight and do what he does best and he does it against anybody.

“It doesn't have to be the best in the world. He goes out there just to try to hurt his opponent and that's what he's training to do. He throws punches from different angles. He has tremendous power in both hands. Everybody knows that. There is no secret to that. He doesn't respect whoever is in front of him,” Garcia said.

Under the tutelage of the respected Garcia, Maidana’s career has blossomed with the pair recording four wins out of four since they got together in 2012 following the boxing ace’s loss to Devon Alexander.

It was Garcia who masterminded the stunning victory over Broner, with Maidana insisting - despite what some may feel - he doesn’t need the knockout to win.

“With Broner, everybody thought I had to knock him out and I beat him with a decision. I am preparing myself to go 12 rounds if it's necessary [for Mayweather]. I'm preparing to hurt him every time I throw punches and if a knockout comes, then great, but I am preparing myself to win after 12 rounds.

“I already beat Broner the way I did and I think I can do the same with Mayweather,” said Maidana.