Chelsea star Didier Drogba has been ruled out of his side's crucial clash with Arsenal on Saturday with a knee injury.

Blues fret over striker ahead of Barca return leg

Chelsea star Didier Drogba has been ruled out of his side's crucial clash with Arsenal on Saturday with a knee injury. Drogba picked up the knock during his side's 1-0 win over Barcelona in the first leg of their UEFA Champions League semi-final on Wednesday. The Ivory Coast international is also a doubt for the return game at Camp Nou next week, with Blues boss Roberto Di Matteo admitting his injury will be assessed over the weekend. "Didier Drogba will be out tomorrow," said Di Matteo. "He has got a knee injury from the week. "We have to assess him tomorrow and Sunday and see how we recovers. "He got pushed and kicked around. It's difficult with the percentage chance." Chelsea will also be without David Luiz and Branislav Ivanovic for the trip to the Emirates through injury and suspension respectively.