"What he showed against Collazo was that he now has the discipline. Amir used to do well in the first few rounds and then all of a sudden he'd go into the trenches and that's when he'd get in trouble. I think he's matured now and there's every chance he could get Mayweather at the right time. Style-wise, he's probably the only person in the world who can match Mayweather for speed."