Chelsea star Frank Lampard has admitted he is wary of opponents Steaua Bucharest ahead of their Champions League group game tomorrow night.
Having lost their opening Group E game at home to Basel two weeks ago, Chelsea will not be taking any team for granted.
"You can never underestimate any team in the Champions League," Lampard told Sky Sports.
"In the first game we didn't perform well, we lost. That's what happens.
"(But) we've got five games now to go, five games to put that right. That's a lot.
"We don't expect an easy game. We're lucky to have played Steaua Bucharest last season so we're fully aware of the good team they are. Last year we started slowly and we lost the game in the first half.
"Considering the position we're in now - we need a result - we have to start the game at a top level."
Despite taking a 45th minute lead through Oscar against Basel, they fell to a 2-1 defeat.
Furthermore, Chelsea lost 1-0 to Steaua Bucharest in Romania in the first-leg of the season's Europa League last-16 - but sealed their place in the quarter-final with a 3-1 home leg victory.
With the Champions League having alluded Jose Mourinho during his first spell at Stamford Bridge, he will be looking to put the shock defeat to Basel behind him with a win tomorrow night.
Chelsea go into the game off the back of a 1-1 draw against London rivals Tottenham Hotspur in Premier League. The game reunited Mourinho with his former assistant and ex-Chelsea manager Andre Villas-Boas.
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