Chelsea midfielder Michael Essien has sustained a knee injury in training.

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Chelsea midfielder Michael Essien has sustained a knee injury in training.

A statement from the club said: "Michael suffered an injury to his right knee during training this week.
"He will undergo tests over the next few days to determine the extent of that injury. Until we have the full results of those tests we will not be commenting further."
The 28-year-old Ghanaian was ruled out for more than six months in 2008 when he sustained cruciate ligament damage.
Essien also missed the 2010 World Cup because of a knee problem, and the midfielder's latest setback is a blow to new Chelsea manager Andre Villas-Boas, who is preparing his squad for their trip to the Far East, where they will compete in the Asia Cup.www.mannastores.com