Hatton belongs at 140 because thats where he is natually stronger than most of his opponents and being stronger is a big part of his game because he likes to swarm, hold, hit.

At 147 that part of his game isn't as effective because the guys are bigger and stronger their as it showed with Collazo and Mayweather.

To me though that isn't an excuse to why he lost to Mayweather.

I feel even at 140 Mayweather would put on a very similar performance because he is simply the bigger, smarter, better boxer.