Trezeguet is fucking stupid. He got 80 minutes and didn't score in those 80, so what chances is he gonna have when he's tired...he's slow even when the game first starts, after 80 he might as well be invisible.
Yeh yeh hes a deadly finisher and all that bs that people will tell me after this post, but what are we gonna really create with a 2nd string midfield (no nedved, no camo, no sissoko), though the midfield did fairly well without, and down to 10 men.
The answer is: not much at all . Not to mention Trez hasn't even played too many matches since he came back from injury, so he may be match fit, but not super fit.
So, bringing on a man who can hold up the ball times better, create his own chances, and has fresh legs was a perfect decision, if there's anyone who coulda bitched it woulda been Iaquinta, he got taken off pretty early and was playing well and scored. What Ranieri said is exactly true, down to 10 men with Trezeguet on is like having 9 men on the field, having 9 men on against Chelsea with the likes of their defense and Essien and co. = suicide, so introducing a fresh Amauri was the right decision, and Trez was lucky not to be taken off earlier in the first place.