Didier Drogba's killer third goal at Anfield on Tuesday night looks to have ended Liverpool's interest in this year's Champions League - but the Ivorian says the Blues must still guard against complacency in the second leg.

Liverpool will need to score at least three times at Stamford Bridge to deny Chelsea a place in the semi-finals - a feat they have not managed since they last won the league title in 1990.

But the comeback kings of the competition - who famously recovered a 3-0 half-time deficit against AC Milan to lift the trophy in 2005 - will not go quietly, Drogba predicts.

"Anything is possible in the second leg," he said. "We managed to score three goals but Liverpool can do it as well in the return match and we have to concentrate for 90 minutes to qualify. They will be dangerous still and we know they have players who can cause us problems even with our advantage. 

"But we should be confident because I think it was the best performance we have managed this season. It's the sort of performance we've been looking for. We want to reach this level consistently now. As long as we play like that, I think we can go far.

"I think we played with great intelligence and character and reacted really well after falling behind so early. I felt I had to score because I missed two clear chances in the first half and was frustrated."

Drogba hailed two-goal hero Branislav Ivanovic, saying: "He scored a headed goal for Serbia against France at the Stade de France, so I knew that he can jump. It's not easy to come into a game like this when you have not been playing many games and he made the difference. He was the man of the match."

If Chelsea complete the task, they will almost certainly face 2006 Champions Barcelona, who thrashed Bayern Munich in the night's other quarter-final."Barcelona do strike fear in everyone," Drogba said. "There's no doubt that them scoring four in the first half against Bayern is scary."

Meanwhile, John Terry has blasted Liverpool players for pressuring the referee to book him for an innocuous challenge on Pepe Reina that now rules him out of the return leg.

"It's disappointing when you see three fellow professionals surrounding the referee asking for a yellow card - especially Alonso, who was crying a couple of years ago that Eidar Gudjohnson got him booked.

"They fans were delighted with me getting booked and maybe that distracted their players a little bit. We responded well and scored the second after that and stepped it up a bit. But we are nowhere near in the semis yet and we need to make sure we shore things up in the return match and try not to let them back in."