Chelsea’s ongoing pre-season campaign is beginning to prove to Enzo Maresca which players are best suited to the system he is looking to play. A number of first team players have seen themselves feature in brand new positions under the new manager. Reece James has been inverting into midfield in the opening two friendlies, with him saying he has enjoyed the challenge that comes with the new role. READ MORE: Enzo Maresca played £50m Chelsea man in completely new position during pre-season game vs WrexhamMaresca’s system seems to revolve around one defensive midfielder being helped out by the in…