Guus Hidink revealed that the Ivory Coast hitman has a problem: "We did some exercise yesterday when he got injured," said Hiddink.
"We did some shooting practice, he hit the ground with his toe and the reaction was in his ankle.
"He will not be in the squad for tomorrow. It's a little problem and he will hopefully be available for next Wednesday (when Chelsea take on Liverpool in the Champions League)."
Also out is Portugal right-back Jose Bosingwa. He has a hamstring problem.
Better news for Chelsea fans is the return of Nicolas Anelka and Ricardo Carvalho who missed international matches this week.