Despite enduring a somewhat slow summer at Arsenal, Edu and his team now finally look to be making progress in the transfer market. Riccardo Calafiori could undergo his Arsenal medical next week, and Mikel Arteta is getting ever closer to welcoming his second summer signing. David Raya’s permanent arrival has been the only move thus far, a signing that was something of a formality after his loan last season. And otherwise, the only significant moves the club have made have been for the under-21 side, welcoming the likes of Lucas Nygaard. The 18-year-old joined from FC Nordsjaelland where he ha…