-------------------------------Ederson------------------------------------
---------John/Akanji---------Ruben---------------Ake/Guardiol-----
--------------------Kimmich/Rico --------Rodri--------------------------
Paqueta/Bobb---Foden/KDB------Bruno/Neves-----Grealish/Doku
---------------------------Haaland/Alvarez-------------------------------
Important is to get Kimmich.
If walker goes, Pep will use similar system, he uses whenever Rico plays.
But Kimmich is world-class player and Rico will also learn a lot and get the minutes..
Plus, Kimmich can cover for Rodri..
If Bernardo goes, we definitely need Paqueta. He can play RW, like Grealish plays LW.
Control the ball, the tempo, etc. He can also play LCM / RCM, like Bernardo does.
That's the minimum for me, to maintain the level we have, in case Bernardo / Walker are gone.
After that it depends. If Kovacic goes, we definitely need someone and that young player from
Benfica will be a good investment for the future.
If Matheus also goes, in addition to Kovacic, then Bruno Guiamares is the perfect candidate