Arsenal have been linked with Bologna striker Joshua Zirkzee for a summer move, but a deal could be difficult to complete. It was recently reported that the Serie A side would want £50m to do a deal in this window, but a release clause would lower his fee to £34m in the summer. However, it has now emerged that only his former club Bayern Munich are able to sign him at that price, and any other interested party will have to negotiate a potentially huge money deal to sign him. Zirkzee has been excellent in the Italian top flight this season, with seven goals and two assists in 19 appearances, an…