Floyd Mayweather Jr. (L) looks on as UFC fighter Conor McGregor speaks about their upcoming fight during a press call at the Staples Center in Los Angeles, California on July 11, 2017. The two will fight August 26th in Las Vegas, Nevada. / AFP PHOTO / Gene Blevins (Photo credit should read GENE BLEVINS/AFP/Getty Images)
Countdown to Mayweather vs. McGregor
What makes Conor McGregor tick? Is this fight good for boxing? SI's Jon Wertheim gave CNN World Sport's Don Riddell his opinions.
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Mayweather v. McGregor 9 videos
Floyd Mayweather Jr. (L) looks on as UFC fighter Conor McGregor speaks about their upcoming fight during a press call at the Staples Center in Los Angeles, California on July 11, 2017. The two will fight August 26th in Las Vegas, Nevada. / AFP PHOTO / Gene Blevins (Photo credit should read GENE BLEVINS/AFP/Getty Images)
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LAS VEGAS, NV - AUGUST 26: (R-L) Floyd Mayweather Jr. throws a punch at Conor McGregor during their super welterweight boxing match on August 26, 2017 at T-Mobile Arena in Las Vegas, Nevada. (Photo by Christian Petersen/Getty Images)
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Boxer Floyd Mayweather Jr. (L) and MMA figher Connor Mcgregor pose during a media press conference August 23, 2017 at the MGM Grand in Las Vegas, Nevada. Mayweather, the 40-year-old undefeated former welterweight boxing champion, has been lured out of retirement to face McGregor, a star of mixed martial arts' Ultimate Fighting Championship. The two men meet in a 12-round contest under boxing rules on August 26th that is tipped to become the richest fight in history. / AFP PHOTO / John Gurzinski (Photo credit should read JOHN GURZINSKI/AFP/Getty Images)
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LOS ANGELES, CA - JULY 11: Floyd Mayweather Jr. and Conor McGregor faceoff on stage during the Floyd Mayweather Jr. v Conor McGregor World Press Tour at Staples Center on July 11, 2017 in Los Angeles, California. (Photo by Harry How/Getty Images)
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