Somebody show me when Sergios knee fell apart

[ruthless rocco]

I'm re-watching the fight now and what I've noticed is that Martinez is never on his toes. Even in the first round he's on shifting his weight from the middle of his foot to the back of his heel. He's strangely awkward with his feet. He appears to be very mobile but if you look at Cotto he's always pushing off with his toes but Martinez is all middle of the foot and heel with almost no weight being put on the toes and by extension no weight being put on the knees. That explains why he was so easy to knock down. Your toes are your balance if you aren't using them then it's quite easy to knock you over.

After re-watching the Williams fights as well as the Cintron fight I can see that Martinez was up on his toes and using them for movement as well as for power when punching. That just isn't there in the Cotto fight. So there may not have been a point in the fight where Martinez injured his knee...infact there may not have been a new injury to his knee at all. But his behaviour in the Cotto fight suggests that he didn't have the same confidence in his abilities that he used to. He fought differently and he paid for it.