Floyd Mayweather Jr. is keeping busy in preparation for his Sept. 14 fight against Canelo Alvarez.  In addition to training for the bout, Mayweather tweeted his next endeavor: selling women's shoes and handbags.

Mayweather announced his new business on Monday.

"I've got a new business venture coming soon with top of the line women shoes & handbags," he tweeted.  "Only name brands will be part of this venture.  More info coming soon..."

While launching his new business venture, Mayweather continues to train for his bout against Alvarez.  He's kept fans updated with photos on Twitter.

Mayweather announced his fight against Alvarez shortly after defeating Robert Guerrero in May.  Mayweather, who holds a welterweight and junior middleweight title, will fight Alavarez for the middleweight title at 152 pounds, according to ESPN.

Mayweather has been criticized for choosing his own opponents.  The fight against Alvarez, however, is expected to be a competitive battle that'll truly challenge Mayweather's undefeated record.  It's also a battle of experience versus youth: Mayweather is 36 years old and Alvarez is 23.

"It's a done deal and Floyd is very excited to give the fans what they want," Leonard Ellerbe, one of Mayweather's advisers, told ESPN.  "This is the fight they wanted and this is what they are getting.  It's the biggest fight in all of boxing.  It's the biggest fight Floyd can possibly make."

The September fight is the second of Mayweather's six-fight, 30-month deal with Showtime, which is expected to earn Mayweather at least $32 million per fight.  He was named Sports Illustrated's highest-earning athlete in 2013 for the second straight year with an estimated income of $90 million.