Today's front-page headlines from Marca, AS and Mundo Deportivo.

Time to suffer
Leo and Xavi to lead Barca in their attempt to comeback
The players are convinced they can give it their all in the return
They want to dedicate their win to Tito Vilanova
Roura: "The perfect game would be progressing by whatever means"
Ambrosini: "We will play with grit between our teeth"
Out of glucose
Cristiano played carrying despite being unwell in the final minutes at Balaidos after suffering from the flu
He felt weak and had to take pills to recuperate his energy
Philippe Montanier: "The team is ready to achieve"
Formula 1 Australia: The great challenge for Alonso
Fernando confident of winning his third world title after seven years

Comeback or a change of cycle
Pique: "Who believes that we will not comeback should not come"
The betting houses: Milan are favourites
Barca playing today to save their European dream
Xavi and Alexis will start in their attempt to come back from 2-0 down
Raul is in Madrid
He had dinner last night at Txistu with Figo, Hierro, Morientes, winners of the ninth
Malaga goes crazy ahead of the visit of Porto
Courtois could stay another yeart
No goals and no chances between Granada and Zaragoza
Zaragoza still without a win in 2013

To the quarters
The Camp Nou will be full and will have a mosaic to help with the comeback
Pique: "He who does not believe should not come, we need the help of everybody"
Roura: "The perfect game is if we play well"
Allegri: "We will go out with three forwards"
Xavi in the team list, practise with three defenders and penalties
Real Madrid: Assure that Mou and Florentino have settled their difference for months