Mayweather vs. the winner of Cotto/Martinez @ 160

After Martinez' last few outings, i'm convinced Floyd beats him at 160. I was halfway sure even when he was knocking out the likes of Paul Williams and Matthew Macklin, but now i'm completely sure after seeing him against Murray. He's lost his speed and reflexes, and the hands down style that he's grown accustomed to won't be beneficial against a laser accurate fighter like Mayweather. I think Cotto beats Martinez and Floyd does the same thing he did to Cotto the first time. Roach can't change Cotto as a fighter or give him a gameplan to beat Floyd, IMO.