Barcelona defender Carles Puyol believes the Champions League holders will have to play 'almost a perfect game' to stay in this season's competition.
However the Spain international is quietly confident they can overturn a 2-1 deficit against Liverpool at Anfield tomorrow.
Speaking ahead of a training session tonight, Puyol, 28, spoke of the mood of determination in the dressing room.
He said: 'We are going to have to play almost a perfect game to come away with the right result.
'I am always motivated by a situation like this.
'When you are playing in front of such an inspirational crowd, it is going to give some sort of strength to the home side.
'However, as players we are used to playing in big games in big stadiums. We are focussed and looking forward to it.
'We have a team full of dangerous forwards that can hopefully do some damage.
'We are all keen to win the competition for the second time and confident of putting on a good show.'
Puyol laid down the ground rules for getting a victory that would propel them into the next stage.
He said: 'First of all we have got to play in our own style.
'We have got to concentrate hard and must remain patient if things are not going our way.
'The earlier we can get a goal the better it is for us.
'But we cannot forget about defence as Liverpool are dangerous on the counter-attack.'
Coach Frank Rijkaard has recalled playmaker Deco and defender Lilian Thuram for the last-16 second leg.
Both players were rested from the Barcelona squad for Saturday's 2-1 league defeat at Sevilla, but have been named in an 18-man travelling party.