Post fight interview of Pacquiao by Larry Merchant revealed that he bluffed Miguel into thinking that he was not affected by any of Cotto's power at all. Then admitted that it actually did.... bigtime.

Pacquiao just showed that he knew, that for anyone to win in a mega fight, you need not only control the physical aspect of it, but likewise the psychological and emotional aspects of it as well.

In the Cotto's corner after the fourth, it was all too evident in Miguel's look of anguish, that he realized he was receiving the short end in most of the exchanges. He might have reached a maximum in his belief that the fight on hand was an even one, and felt the first signs of just going into a survival mode instead of fighting a way to win.

All too naturally his emotions went downhill as a result, and so too did his ability to compete physically, (not knowing that he was likewise hurting Pac by large... had he just known!).

Maybe a seed of doubt grew, stemming from Miguel's realization that his fight preparations loomed inferior and inappropriate against the opposition's, and magnified more with the magnitude of the fight on hand.

By then it was too late for any second-guessing!

If for anything at all, this should serve Miguel well in future fight preparations. Like what an enduring multi-titled champion always maintain... "train hard, the fight is easy".