That's just not true. You see it when we line up during a game. Cuadrado and Mandzukic are always as high up the pitch as Dybala, while Khedira and Pjanic are clearly playing a deeper role. That's what defines formation: the position of the players. So we do play a 4-2-3-1.
No we don't. The position of the players depends on the team we are facing, and the moment of the match. The formation we play, when talking about systems with similar positioning like these two, is defined by the roles the players play.
Mandzukic and Cuadrado do an outstanding amount of defensive work. We all always see them track back all the way to our box. Cuadrado himself is right footed and plays as a pure winger, up and down. Mandzukic plays as a LM. He doesn't run nearly as much into the box as Cuadrado, he doesn't have his speed to recover position so quickly so he plays it more conservatively. Given his characteristics, if he was a true inside forward he would camp on the final third a lot more, but he doesn't. He plays further back, something like Perotta did for Lippi.
Dybala does not play as an AM. He is the classic trequartista in this system.
Overlap this system with many of Lippi's formations and they match remarkably well. Why did we call it 4-4-1-1/4-4-2 back then and not now?
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We don't, but in reality, do we?
nope
Pick an archetype of these positions and compare them.
Alexis and Pedro at Barca were inside forwards. Cristiano at Madrid is an inside forward. Martial at United is an inside forward, etc. These players attack the box first and foremost and don't particularly contribute to the width of the team when compared to other classic wingers (like Cuadrado or Valencia). They also for the most part play inverted, so they can shoot at goal much easier.
Same with the AM situation. Dybala is not a midfielder. He is playing trequartista like so many other's before him in our league. His role and responsibilities are like Baggio's much more than they are like Ozil's.
For the thing about DMs, neither Khedira nor Pjanic are playing DM. Khedira has done it in the past (at Madrid) but now he is the midfielder that has more license to roam when compared to Pjanic. Pjanic stays further back, but he doesn't DM, he controls the tempo of the play. He is playing regista, not to the extreme of an older Pirlo, but its a similar role. We have no Gattuso or Cambiasso.