Ernesto Valverde welcomed Lionel Messi back into his starting XI but that did little to calm a nervy camp Nou until Roma took matters into their own hands and shot themselves in the foot on both sides of the interval aiding Barcelona to what could be a tie-sealing 4-1 win in the first league of their quarter final encounter.
Lionel Messi was in the thick of the action as Daniele De Rossi and Kostas Manolas put through their own net to settle a rather nervy camp Nou.
Gerard Pique got Barecelona's third before the hour mark but Eden Dzeko registered Roma's first of the night 10 minutes from time while Luis Suarez restored Barcelona's 3-goal cushion in the 87th minute.
It was the Uruguayan's first goal in over a year as his last was in last season's 6-1 drubbing of Paris Saint Germain at the camp Nou.
AS Roma performed admirably given the absence of midfield talisman Radja Naingolan and winger Cengiz Under but it seems they've left themselves with a lot to do back in Italy as their chancing of overturning a 4-1 defeat at the hands of Barcelona appears extremely slim.
Barcelona's top scorer is Lionel Messi(6) but their second top scorer seems to be goals from their opponents(5 own goals), therefore going forward they'd have to be more clinical otherwise they may fail to qualify for the grand finale for third time in a row.