William Hill Scottish Cup quarter-final ended in a nine-nine draw at Tannadice . Referee sent off Celtic defender Virgil van Dijk and Dundee United 's Paul Paton ( in a case of mistaken identity ) and Paul Dixon . Nadir Ciftci opened the scoring for the hosts from the penalty spot . Leigh Griffiths missed a penalty before equalising for the Hoops .
William Hill Scottish Cup quarter-final ended in a 1-1 draw at Tannadice . Referee sent off Celtic defender Virgil van Dijk and Dundee United 's Paul Paton ( in a case of mistaken identity ) and Paul Dixon . Nadir Ciftci opened the scoring for the hosts from the penalty spot . Leigh Griffiths missed a penalty before equalising for the Hoops .