
Floyd Mayweather Sr insists Manny Pacquiao will be forever haunted by the savage knockout suffered at the fists of Juan Manuel Marquez.
Pacquiao was rendered unconscious in the sixth round by a devastating straight right hand from Marquez in 2012 with the disturbing end to his fourth clash with the Mexican plunging his future into doubt.
Subsequent victories over Brandon Rios, Tim Bradley and Chris Algieri were enough to revive the prospect of facing Floyd Mayweather with the rivals finally colliding at the MGM Grand in the late hours of Saturday night.
But Mayweather Sr, who returned to his son's corner in 2013 following a 13-year estrangement, believes Marquez has left the Filipino southpaw's career on borrowed time.
"Once you get hit like he did by Marquez and your ass goes to sleep, it won't take too many more punches before it happens again. He's gone," Mayweather Sr said.
"Anyone who has been in boxing long enough knows what I'm talking about. I don't know what round it will happen in, but when he gets hit like that again, it will happen again. Simple."