Barcelona have maintained their reputation as one of the most exciting teams to watch this season during their latest Champions League outing against Juventus.Unfortunately for fans of the Catalan giants, though, it is their defensive vulnerability as much as their attacking force that makes them so engrossing.Yet again the fragility at the back was exposed in Turin as the Serie A giants ran riot in the opening half an hour of their quarter-final tie on Tuesday.After their heroics against Paris Saint-Germain in the previous round the last thing Luis Enrique would have wanted was an early setback.But that is exactly what happened when Paulo Dybala turned on a sixpence inside the Barca box to unleash a curling strike past Marc-Andre ter Stegen with just seven minutes on the clock.Even though the hosts were happy to let the Spaniards keep the ball, their threat on the counter-attack was there for all to see and yet seemingly impossible to stop.Dybala added his and Juventus' second of the night with another brilliant finish after meeting Mario Mandzukic's cross from the left at the edge of the box.
That gave the visitors a serious mountain to climb in the tie but it could have been very different had Gianluigi Buffon not made a crucial save just 76 seconds earlier.As you can see in the video below, Lionel Messi played a majestic through-ball to Andres Iniesta to leave him one-on-one with the Italian shot stopper.It looked like Iniesta was certain to score, only for Buffon to stick out his left hand to divert the ball around the far post.Even at 39-years-old, Buffon is still one of the best goalkeepers in the world.And his immediate reaction after making the save appeared to echo that sentiment - see below.What a legend!Already a hero of the game, fans loved Buffon's latest great block and reacted on Twitter. Here are the best tweets: