I think Berto is used to being able to tie up the opponent, and usually I am sure thats what his corner would want, but he style is to clinch then figure out where he wants to land punches, I don't think he was expecting not to be able to clinch at all, and meant in the inside fighting was much less containable from a defense perspective because the only option you have is to punch, but he is used to clinching which caused him to be squared up on the inside, and totally out of position, he needs to keep his right left behind him, and have that left shoulder in front where it can block punches, and also have his right hand up by his face. He also throws such wide punches that if you toughen up and decide to throw regardless of what lands on you that he is wide open for the incoming when he is on the inside.

Like ICB said, he should have gone to the body WAY more, its where you can hurt guys who's heads are made of steal. Margarito a lot more vulnerable to the body, and it appears so to is Collazo.

One thing I was impressed about is how Berto delt with the pace, I mean Hatton was worn out at a much slower pace against Collazo, and Hatton is in fatastic shape when he fights, the fact that Berto stayed strong as the fight progressed and always has (watch him against Estrada or Forbes) is an ability that can't hurt.