Liverpool suffered a heavy 3-1 defeat to Chelsea in the first leg of their Champions League quarter-final clash at Anfield last week.In light of this, Rafa's men must score at least three times to progress into the semis, and after 'Pool's recent 4-1 demolition of Manchester United, it is a feat that Spanish goalkeeper Pepe Reina believes to be entirely possible."Istanbul should be the inspiration for us," said the Spanish keeper, referring to the 2005 Champions League win over AC Milan."We know that the tie is really difficult, but still we have hope."We know already that if anyone can turn this around, it's Liverpool."There is always something to exploit. Everybody, every team, has weak points," the stopper added, as reported by Sky Sports.Considering the uphill climb that his team faces, Reina has a distinct positive aura around him."We have to attack and score three goals. Even if we concede one, we'll have the chance to go to extra-time. We have to attack, that's clear. And we'll go for that."We have the game at Old Trafford as a big example. We won 4-1 and no-one expected us to do that. We know already it's going to be almost impossible, but if there's someone who can do it, it's going to be Liverpool."Source: Goal.com