We don't have enough for the simple reason that if we play 3-5-2 (as we did in pre season) an injury to one of our centre backs mean either Tosin or Mangala has to play or we change formation. An injury to Jesus of Aguero means playing Sterling up front or a change in formation.
Last season Nolito and Iheanacho had 39 league appearances between them. They have not been replaced. Kolarov had 28 league appearances the majority of which were at cetre back.
Our team is quite versatile. I don't think we'll stick with 3-5-2 all season. A new cb would definitely be helpful. Although I do think we could see fernandinho, mendy and even yaya feature at cb in 3-5-2 if injuries were to come up. up front I have no concerns over depth. Is Pep the one who played Fabregas as a false 9 at Barca? Regardless, either silva or de bruyne could feature there without us dropping off.
weird lineups that i can see pep trying. remember he prefers small squads. though i know he says we need a bit more...
-----stones--yaya--ota------
walker-----dinho------mendy
kompany injury (dinho <-> yaya) either way.. can't remember if pep is the one played yaya at cb at barca
walker-----kompany--ota-----mendy
----------------gundo------------------
--------b.silva---------kdb-------------
raheem----------silva----------sane
kun & jesus both hurt :(.. yaya could come in for gundo. kdb, b silva, silva all interchangeable. or throw raheem central and b. silva or d. silva wide.
idk i think we are okay without another major signing. sanchez just adds quality more than depth for me. a cb might be needed for depth