Olympiacos coach Takis Lemonis is convinced with Lomana Lualua they can upset Chelsea at Stamford Bridge.

"I don't usually like to single out individual players but we certainly missed LuaLua. He is a key part of the way Olympiacos play and the way we set up our game," said Lemonis, reflecting on Tuesday night's 0-0 draw in Athens.

"We hope he will be fit for the second leg because he is a very important link in the Olympiacos chain."