If you are coming forward you keep your hands up high, and use head movement like Tyson did, Hatton has always done neither when closing the gap, against everyone except COllazo, MAyweather, and Pacquiao he was far too quick for them to counter him. Against these three he was a sitting duck, and Collazo didn't have the power to hurt him, It took awhile for Mayweather to break him down, but Pacquiao definitely had the power to hurt him with one punch.