FC Barcelona could be up for their most toughest test of this seaon when they take on Espanyol at the Camp Nou tonight. Espanyol is fighting a relegation battle and should not worry FC Barcelona in normal circumstances. Then a knock-out match is no normal circumstances. Till this day whenever FC Barcelona went to play we had the assurance of having another match to correct the performance, if something goes wrong. But not with tonight's match. With virtually no gains from the first leg at Espanyol FC Barcelona has to see off a spirited Espanyol side, who looks very well organised under their new coach. Guardiola would have to field a very strong side for today's match. Some section of FC Barcelona fans may disagree with that. In their opinion Copa Del Rey does not generate any interest and FC Barcelona should avoid the temptation to field big players in the game. But I have to differ witrh them; may be it is the most non-glamorous of all the trophies which we are chasing this season, but still the sheer fact that we haven't won this competition for some time should have made us more eager to land this trophy.As usual Guardiola has not yet announced the squad. Keita and Marquez are carrying knocks but are declared fit to play tonight. Pinto should take over from Valdes at the goal. Alves, Puyol, Pique and Sylvinho would ideally make up the back four. The midfiedl should be made up of Xavi, Busquets and Gudjohnsen. Iniesta and Bojan should join Messi to form the front trio. FC Barcelona would be favourite to win this leg; but this would be that kind of match where both the team have equal chances. FC Barcelona needs to take control of the game early and finish off the game early, that's why I would go with a strong starting eleven. FC Barcelona needs to win this match to go through, whereas Espanyol needs only a goal scoring draw. I predict a Barca victory by a margin of 3-0.