Published May 27, 2010
Essien injured a hamstring while playing for Chelsea against APOEL Nicosia in the European Champions League on Dec. 8.
"An evaluation by a combined team of medical experts from the Ghana Football Association and Chelsea Football Club revealed that Essien will not make full recovery until the end of July," the association said Thursday on its website.
Ghana opens the World Cup on June 13 against Serbia, then plays Australia on June 18 and Germany on June 23.
Essien helped Ghana reached the second round of the 2006 World Cup in its first appearance at the tournament.