Tottenham boss Ange Postecoglou returns to Glasgow on Thursday for a Europa League Battle of Britain against Rangers in desperate need of a victory to calm speculation over his future. Spurs have won just once in their past seven games in all competitions -- a spectacular 4-0 rout of English champions Manchester City -- to tumble to 11th in the Premier League and ninth in the Europa League. A 4-3 defeat to London rivals Chelsea on Sunday encapsulated the Jekyll and Hyde nature of the Australian's side in 90 minutes.