"If this season is to be seen as a real success then we have to win the FA Cup, but I do not think that gives us any more pressure," said the defender, who will surely be in the running for Liverpool's Player of the Year.
"Chelsea must be favourites, we know that. It just makes us more determined to beat them.
"The fans demand trophies and that is what keeps the club going and the players too.
"If you want to win anything you must beat the best. And that is Chelsea, they are champions and will be again, so the pressure is much more on them. We are underdogs, they are first, we are third, they must be the favourites.
"They have the best individuals and a very good manager who can bring good individuals together with his tactics to produce an excellent job.
"They have got their form back but they have shown that they can be beaten. And we have done it.
"But I do not want to think of the past games, this is a new one and we have been in good form and we believe we have a chance to beat them.
"Chelsea have been playing a different system, maybe they will go back to the way they played before. They may try to surprise us but we do have things to surprise them.
"The semi-final will be tough for us both, but we have to always believe we have confidence and we can do a good job.
"We have the players who have been involved in big games before, this is no different, so we can go to Old Trafford and enjoy ourselves.
"I know that the hype around us and Chelsea gets bigger every time, but we try not to bother with that. It is another game against a very good team, that is how we think about it.
"Maybe because we beat them in the Champions League is why there is so much hype when we play them.
"Chelsea, maybe, create their own problems, I'm told fans everywhere want us to win. But we are not concerned with that, we have our own fans wanting us to win, that's enough for us.
"We feel we are much closer to them in the league than last season, but they are still first and we are third. We are not happy that we have lost so many of the league games against them, and got nothing.
"We know we have to improve that certainly. But we feel that all the league games, except one when we lost 4-1 at home this season, have been very close between us.
"We conceded from set pieces then, but we always feel the games generally have been pretty equal."