BBC Sport pundit Chris Sutton has sent a warning to Manchester United manager Erik ten Hag ahead of the Red Devils’ FA Cup clash against Newport County. United punched their ticket to the fourth round of the FA Cup after their comfortable 2-0 victory over Wigan in the third round at the DW Stadium earlier this month. Erik ten Hag’s men fell short of the FA Cup trophy last season after Manchester United suffered a 2-1 defeat to crosstown rivals Manchester City at Wembley. The FA Cup remains Ten Hag’s only real chance of securing major silverware this season, with United out of the Champions Lea…