LAS VEGAS, NEVADA - MAY 07: Amir Khan stays down after a knockout punch from Canelo Alvarez during the WBC middleweight title fight at T-Mobile Arena on May 7, 2016 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)
LAS VEGAS, NEVADA - MAY 07: Amir Khan stays down after a knockout punch from Canelo Alvarez during the WBC middleweight title fight at T-Mobile Arena on May 7, 2016 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)