Floyd Mayweather Doesn't Believe Conor McGregor Was KO'd in Sparring Session

Despite rumors, Floyd Mayweather Jr. said Monday that he doesn't believe Conor McGregor was knocked out during a sparring session.

As seen in the following video courtesy of Villainfy Media, boxer Jessie Vargas said last week that the reigning UFC lightweight champion was dropped by his sparring partner (discusses it around the 2:05 mark):

According to Ben Thompson of FightHype.com, Mayweather responded by saying: "If I ain't seen no footage, I don't believe it ... me and Jessie Vargas are in communication."

The 29-year-old McGregor is 21-3 during his MMA career, but his clash with Mayweather on Aug. 26 in Las Vegas will be the first professional boxing match of his life.

McGregor has never lost in the Octagon via knockout, with all three of his defeats coming by way of submission.

During a recently concluded four-city press tour, Mayweather made light of that fact by calling McGregor "Mr. Tap Out."

Mayweather, 40, has never been knocked out as a professional either, as evidenced by his perfect 49-0 record.

During the press tour in Los Angeles, McGregor guaranteed he would knock out Mayweather within the first four rounds of their fight.

Mayweather's last knockout victory came in 2011, when he stopped Victor Ortiz in the fourth round.