Or 4-4-2. We have an almost perfect side for it, if we get one Vidal-esque CM to partner either Cheesio or Pjanic. Khedira-Pjanic or Cheesio-Pjanic would be a little light on ball-winning to play the Lippi style 4-4-2 of our 2003 CL run.
Buffon
Zambrotta-Thuram-Ferrara-Montero
Camo-Davids-Tachhinardi-Nedved
Del Piero-Trezeguet
Whereas we'd have:
Buffon
Alves-Barza-Bonucci-Evra
Cuadrado-Marchisio-Pjanic-Sandro
Dybala-Higuain
If we could swap out one of Marchisio or Pjanic for Vidal, that's a beastly formation. To make it even more attack minded, you could sub Pjaca for Evra, and drop Sandro to fullback. Just needs that ball-winning 6. Pre-injury Mourinho era Khedira could have done it. But he doesn't seem to have the energy to do it anymore. Saul from Atletico Madrid would probably be perfect beside Marchisio or Pjanic there if he continues to develop into a world class player. Kante is another that would be amazing there beside Pjanic. @Osman