suarez admits he was nervous at playing alongside messi and neymar .
the uruguayan , who arrived under a cloud following his ban for biting at last year 's world cup , has made a rapid adjustment to life at the catalan club - scoring vital goals to help put them on course for a treble .
barca face paris saint-germain on tuesday looking to book a place in the champions league semi-finals with a 3-1 lead from the first leg in which suarez struck twice .