Riccardo Calafiori has arrived at Arsenal as the Gunners’ only major signing of the summer transfer window. Arsenal have spent big money to sign Calafiori from Bologna this summer, but, at the moment, it’s not quite clear where he will fit into this team. Indeed, Arsenal had the best defensive record in the Premier League last season, and breaking into that back four is no easy feat. Speaking on The Rest is Football, Micah Richards has been discussing Calafiori’s move to Arsenal, and he has one big question about the Italian after his move to north London. READ MORE: Gary Neville predicts whet…