Floyd Mayweather has weighed in at 146 pounds for Saturday's WBC/WBA Welterweight title fight with Marcos Maidana in Las Vegas.
Mayweather, unbeaten in 45 professional bouts including 26 knockouts, is defending his welterweight belts against Maidana, who came in at 146.5 pounds. The welterweight limit is 147 pounds.
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Saturday's bout at the MGM Grand is on Showtime pay-per-view television. Broadcast begins at 9 p.m. ET.
Argentina's Maidana is 35-3 with 31 KOs, but he is the underdog ways against Mayweather.
Mayweather opted against trash talk at Friday's publicity event. He munched on his chewing gum as he stared down Maidana 24 hours out from their fight.
"I want to look impressive," Mayweather said. "I want to put on a good show. We don't expect this fight to go the distance."
Mayweather stands to pocket $32 million for his part in the fight. Maidana is only guaranteed an estimated $1.5 million.
Mayweather returns to the ring for the first time since dominating Canelo Alvarez in boxing's richest bout, taking on Maidana in a fight that even Mayweather seems to have trouble expressing much enthusiasm about. He's a bigger, much more skilled fighter than the Argentine, just part of the reason oddsmakers make him a 11-1 pick to remain undefeated in the 46th fight of a pro career that has made him the richest fighter ever.
Still, Mayweather says he must be wary of the power Maidana brings into the ring.
"He's got an 80 percent knockout ratio so I can't go to sleep on this guy," he said. "But guys can't go to the mental level I'm at. I can beat them many ways."
The fight is part of a pay-per-view card that features former champion Amir Khan moving up to welterweight to fight another former champion in Luis Collazo. Khan had campaigned to be Mayweather's opponent and won an online poll set up by Mayweather, who ended up picking Maidana instead.
If Khan is impressive, though, and Mayweather wins as expected, the two could meet later this year.
"I would have loved to fight Floyd Mayweather, but I believe it's really for the best," Khan said. "It gives me a chance to get to 147 and feel my way."
Maidana said he can become the first to beat Mayweather because he will be the first to treat him just like any other fighter in the ring.
"Other fighters they show respect, they show fear," he said. "That's one thing I won't show against Mayweather."
Contributing: Associated Press