article_snippet.sent: As Sportsmail exclusively revealed, Celtic manager Ronny Deila has the former Rangers player on a list of Celtic manager Ronny Deila summer targets.
article_snippet.sent: Celtic manager Ronny Deila has been linked with a move for the former Rangers player .
highlights_snippet.sent: Celtic has activated release clause in Celtic contract .
  
highlights_snippet.sent: Celtic have been linked with a move for the former Rangers player .