straight to your inboxPaul Pogba found the responsibility of being a "star signing" at Manchester United difficult to handle, according to former Old Trafford coach Emilio Alvarez.The former United goalkeeping coach believes Pogba has been weighed down by the demands of fulfilling that role at the club he returned to from Juventus for £89million four years ago.Pogba is yet to fulfill the expectations on him following his return to Old Trafford, but Alvarez, who left United in September last