Floyd Mayweather Jr has defended his decision to take on Andre Berto in his final bout.

The unbeaten Mayweather is bidding for his 49th successive victory when he meets Berto in Las Vegas on Saturday, but he has faced criticism for not considering bouts with the likes of Amir Khan or Kell Brook.

However, the 39-year-old claims that he has not selected an easier opponent by choosing to meet Berto.

"Berto is not a pushover, but no matter who I chose, the media was going to have something to say. The critics were going to have something to say. He's no different from Amir Khan," Mayweather told reporters.

"Amir Khan has three losses and Berto has three losses. He's a two-time world champion just like Amir Khan. Virgil Hunter (Berto's trainer) is a remarkable trainer and he's done remarkable things with Andre Ward's career."

Berto has lost three of his last six fights.