straight to your inboxMark Bosnich believes he has identified a technical flaw that is responsible for David de Gea's increased mistakes at Manchester United.United were knocked out of the FA Cup to Chelsea on Sunday as de Gea conceded three soft goals in a 3-1 loss.The second goal, in particular, was a big mistake from de Gea as he let Mason Mount's shot slip underneath his hand.It was a similar error to one de Gea made against Tottenham Hotspur last month and Bosnich does not believe that is a