Two footballing worlds collide when it come's to DM. In England we seem to like the no nonsense, tough in the tackle and oof it out type. In Most of Europe and South America they would rather have a footballer to start the quick breaks.. and always be on the front foot.
Pellegrinis System isnt really all that geared up towards being a solid defensive unit like Mancini, and that is the compramise you make when playing atractive free flowing football. Unless everyone in the team is 100% focused on reading the game you will get times when the two centre backs are made to look silly. That being said, the guy has always stood out for his galring lack of pace, in other leauges this would be less of an issue. In the premier leauge however, the games is played so fast he just physicaly cant keep up at time's, although that let's his poor positioning of the hook to easily.
when all is said and done, it's a very experienced manager who is really showing his flaws in all this, unable to compramise from his total football method, even when the problem is glaringly obvious. Thats what concerns me more, rather than play a guy who can actually defend, he will put in a guy with a lenthy record of being a liability because he can pass better..