There’s a 23-year-old player currently in Chelsea’s squad that the club values as an ‘integral’ individual moving forward. The Blues have assembled an expensive but young group in recent transfer windows, so everyone is keen to see how this strategy plays out in time. It now falls on new head coach Enzo Maresca, 44, to get the best out of this talented squad. READ MORE: Enzo Maresca: Style of play, tactics, favourite formation and stats as Chelsea appoint latest managerial mastermindWhen you think about the key players at Stamford Bridge, 24-year-old club captain Reece James instantly springs …