Marquez insists he didn't take drugs to beat Pacquiao
Mexican insists drug checks will be negative and says he'd be happy to have Olympic-style testing after knocking out Manny Pacquiao

Juan Manuel Marquez insisted he was a "clean fighter" after his demolition of Manny Pacquiao.
The Mexican, whose more muscular form drew attention before Saturday's bout, predicted drug tests in Nevada would come back negative.
He also said he intended to do random, Olympic-style testing before his next fight.
"I feel very happy with my training. I feel great about the tests," Marquez said from his Las Vegas hotel suite before boarding a flight home. "I won't have a problem."
Marquez, 39, rallied from three bitterly contested fights against Pacquiao - two losses and a draw - to knock out Pacquiao with a precise right counter-punch late in the sixth round.
His new muscular shape emerged in a training camp overseen by former steroid figure Angel "Memo" Heredia, who called Marquez a "Hulk" at a news conference last week.