Floyd Mayweather has warned Saul Alvarez his unbeaten record will come to an end in Las Vegas on Saturday night.
Alvarez brings a 42-0-1 record and, at 13 years Mayweather's junior, is widely predicted to give his superstar opponent a thorough physical test at the MGM Grand.
The Mexican, whose WBC and WBA Super belts will be up for grabs, is the more natural light-middleweight but Mayweather has previously held both titles and was in no mood to contemplate defeat at his final press conference ahead of the weekend.
He said: "Alvarez hasn't faced 42 Floyd Mayweathers, because he'd be 0-42, so I don't really worry about who he's faced.
"Whatever any fighter can do good, I can do great. I was born to be here, to be at this level.
"I'm at the pinnacle, I'm the face of boxing, and I'm dedicated to my craft."
Alvarez was no less confident, if slightly more humble, saying: "We had a great preparation. We feel great - ready for Saturday.
"We're just waiting for the day, and we're ready to win like always. We prepared like never before. You can be sure that on Saturday we will win."