Tickets for the Sept. 14 junior middleweight title fight between Floyd Mayweather Jr. and Saul “Canelo” Alvarez at MGM Grand in Las Vegas are already sold out, less than 24 hours after they went on sale, Golden Boy Promotions announced Wednesday.

“This sellout doesn’t surprise me because this is what happens when the best fight the best,” said Mayweather, who will be putting his record of 44-0 and 26 knockouts on the line.

The bout will be televised on Showtime pay-per-view. It will also be available on closed-circuit at six MGM properties – Aria, MGM Grand, Mandalay Bay, New York-New York, Monte Carlo and The Mirage.

Alvarez, at 22, is 14 years Mayweather’s junior. He is 42-0-1 with 30 knockouts.