article_snippet: Celtic defender Virgil van Dyke (right) was sent off after only nine minutes of the Scottish Cup quarter-final .
article_snippet: In what appeared to be a case of mistaken identity, the referee also sent off Dundee United's Paul Paton .
article_snippet: Dundee United had a second player sent off after Paul Dixon (3rd left) receives Paul Dixon (3rd left) marching orders .
highlights_snippet: Referee sent off Celtic defender Virgil van Dyke and Dundee United's Paul Paton (in a case of mistaken identity) and Paul Dixon .
  