The midfielder , who is in China for the start of the club 's pre-season tour , is now tied to the London outfit until the summer of 2013 . Ghana international Michael Essien signs new five - year contract with Chelsea . Czech duo Petr ##ín and Wayne Bridge in agreeing long - term deals . The year - old has made 143 appearances since joining from Lyon in 2005 . Dutch defender Mohamed Boulahrouz leaves Chelsea for Stuttgart on 4-year deal .
Ghana international Michael Essien signs new five - year contract with Chelsea . Czech duo Petr ##ín and Wayne Bridge in agreeing long - term deals . The year - old has made 143 appearances since joining from Lyon in 2005 . Dutch defender Mohamed Boulahrouz leaves Chelsea for Stuttgart on 4-year deal .