The glass-half-empty members of the Manchester United fanbase may tell you that Erik ten Hag’s side are going into Saturday’s Community Shield in a worse shape than they did May’s FA Cup final. And, OK, they may have some semblance of a point. Raphael Varane has gone. That, coupled with the injury doubts hanging over Harry Maguire, Victor Lindelof, Aaron Wan-Bissaka and Luke Shaw, leaves the Red Devils’ backline looking threadbare already. And that’s without even mentioning the three-month lay-off facing Manchester United’s new £52 million signing Leny Yoro. Casemiro also remains United’s most…