EASY NIGHT FOR AMIR.
Khan's coach predicts he will win every round as the headline act at Mandalay Bay before stopping the big-hitting Argentinian.
Ahead of his third WBA light-welterweight defence American Roach said: "Amir doesn't just go in there now and look for a one-punch knockout.
"He knows how to break a person down, work behind his jab and then finish them off. He's become a completely different fighter since he began working with me.
"We've not lost one round since we've been together. Amir is a 100 per cent better fighter.
"I have never had a fighter who listens, learns and takes advice so well as Amir Khan."