The midfield two in front of the back three is where Rosenior’s version of the 3-2-2-3 differs from Maresca’s.
The former Blues boss often opted to invert a full-back, alongside Moises Caicedo, to form a midfield two.
Rosenior prefers both players here to be starting central midfielders.
By avoiding players having to swap roles, this appears to be a safer approach as it reduces the likelihood that the middle of the pitch may be exposed at any time.
The new head coach will need to consider who best fits the role directly alongside Caicedo.
Chelsea‘s right-back and captain Reece James may even be considered for a central midfield role under Rosenior.
Having coached Andrey Santos at Strasbourg last season, Rosenior will also know how to get the best out of the Brazilian in midfield, so he could be a contender.
Enzo Fernandez is the other obvious option, but given his attacking contributions Rosenior may opt to use the Argentine higher up the pitch.