A key West Ham star has returned and will leave his new head coach Julen Lopetegui in shock at his condition. West Ham have not looked great in pre-season and the club are struggling to make signings. The new Premier League season gets underway in less than three weeks and Julen Lopetegui is under pressure to hit the ground running. Not least because he was far from first choice among West Ham fans before his appointment. Lopetegui had not even officially started work at West Ham when he was hit by a huge blow this summer. Because when captaining Mexico in their opening game of Copa America mi…