I don't know what to expect from tiago, he doesn't play well in a 4-4-2. He plays better with 2 DM's behind him so he doesn't have to go and win balls, somewhat similar to milan's system. Where they have pirlo playing off of ambrosini and gattuso. But still, there's no excuses if he plays poorly. He's had plenty of time to adapt to our style of play. I can't wait to see a tiago screamer from 35 yards out. I've been waiting all season.
I've heard a 3 man D but it could be like you posted also during the game. Grygera, Brazzo, Nedved, Nocerino and Tiago can all play different positions.