Chelsea’s summer started as a spectacular rocket launch. The appointment of Xabi Alonso, followed swiftly by the signing of Morgan Rogers, had the Stamford Bridge soaring. It ended, however, with a crash landing. The sale of vice-captain Enzo Fernandez to Manchester City, and even more damaging, the failure to secure a replacement. The embarrassment of the deadline day snubs was so severe that one of the sporting directors responsible has since …