article_snippet: Celtic have so far refused to comment on the matter.
article_snippet: Scott Brown was a £4.4million signing from Hibernian in 2007 – the largest fee between two Scottish clubs.
article_snippet: The Scotland international (left) joined Celtic in a £4.4m deal from Hibernian in May 2007 .
highlights_snippet: Scotland international joined Celtic for £4.4million from Hibernian in 2007 .
  
highlights_snippet: Celtic face Dundee United in the Scottish League Cup final on Sunday .