Aberdeen 0-2 Celtic: Mikael Lustig and Sam Cosgrove see red as Hoops move nine points clear of Rangers thanks to Moussa Dembele and Kieran Tierney.Celtic moved back nine points clear of Rangers at the top of the Ladbrokes Premiership with a 10th successive win over Aberdeen.Striker Moussa Dembele put the visitors ahead with a header in the 37th minute at Pittodrie.Despite Hoops right back Mikael Lustig being sent off by referee Bobby Madden for a second booking in the 76th minute, the champions doubled their lead through left back Kieran Tierney in the 83rd minute.