Liverpool legend Graeme Souness has dropped his prediction for Manchester United against Arsenal at Old Trafford after sending an important warning to Erik ten Hag. Manchester United return to Premier League action on Sunday, with title challengers Arsenal travelling to the Theatre of Dreams for their crucial league clash. Erik ten Hag’s men suffered a humiliating Premier League defeat on Monday after Crystal Palace trounced United 4-0 at Selhurst Park. The Red Devils languish in eighth place in the league table and are three points behind seventh-place Chelsea, who have played one match more …