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 . Midfielder follows Petr Cech and Wayne Bridge in agreeing long-term deals . The 25-year-old has made 143 appearances since joining from Lyon in 2005 . Dutch defender Khalid Boulahrouz leaves Chelsea for Stuttgart on 4-year deal .