Mikel Arteta sends warning to Ruben Amorim over his new 'unpredictable' job... and admits the manager's 'fingertips' are already all over Man United ahead of his maiden trip to face Arsenal at the Emirates
JAMES SHARPE: The Portuguese boss, who won two league titles at Sporting Lisbon, faces his toughest test yet when he takes United to the Emirates Stadium on Wednesday night.
