he previously played for feyenoord from 2003 to 2006 and chelsea from 2006 to 2012. while at chelsea, he won numerous honours, including the premier league, the uefa champions league, four fa cups and the league cup. he moved to lille on a free transfer in july 2012 upon the expiry of his contract at chelsea, where he spent two seasons before moving to hertha for an undisclosed fee.