If we use three mids, then one of them don't have to stick to his position. SMS would do much like Paul did when he was here at the 352. I too don't see either of them 'locked' into a two man midfield. On the other hand the unsung hero Matuidi is something I can't $#@!ing stand (as a skillset in a midfielder) as he isn't even strong. I'd prefer Bentacur as at least his passing range, vision and technique are on another level already compared to the french.

