Barcelona 1 Paris Saint-Germain 1: agg: 3-3, Barcelona win on away goals: match report They swiftly sensed that Barcelona were vulnerable through the middle. Adriano was no replacement for Javier Mascherano, let alone Carles Puyol. Mistakes and PSG's speed on the counter brought serious discomfort to Barcelona fans, whose mood improved only when Messi arrived. Sergio Busquets lost the ball to Lavezzi, who ran through and only Gerard Piqué"s alertness stopped him. Errors scarred Barcelona's usually pristine work. Piqué even played the ball to Ibrahimovic. All was not well. Even Iniesta gave the ball away, the type of event surely followed by four horsemen saddling up. Barcelona showed some of their elegance moving the ball into the final third but there was no finish in the first half. Pedro, David Villa and Fabregas were poor. There were moments of hope. Iniesta capped a long move with a shot blocked by Christophe Jallet. Villa concocted a neat flick to Dani Alves. Iniesta, spotting Salvatore Sirigu off his line, lifted the ball goalwards from 45 yards. The crowd followed its passage, all but a small quarter of the Nou Camp willing it to drop, but it cleared the bar. PSG were content to hit on the counter. From a Jallet cutback, Lucas Moura's angled drive was saved by Valdes. Iniesta attempted to sharpen Barcelona's surges, dribbling past Jallet and Verratti. He then shimmied away from Ibrahimovic. Pedro briefly threatened with a promising run. But Barcelona were not hurting PSG. The Nou Camp began whistling at one long PSG move. Well prepared by Ancelotti, the visitors kept looking to exploit rare hesistancy by Barcelona. Ibrahimovic worked the ball calmly through the middle to Lavezzi, whose quick break had taken him ahead of Jordi Alba. Valdes saved well and Pique swept up the pieces. Below par with dead balls, Ibrahimovic's creativity from open play almost brought PSG reward. He stood up a cross from the left met by Lucas Moura , whose header was pushed away slightly inelegantly by Valdes. When Adriano then fouled Lucas Moura, Ibrahimovic's free-kick slammed into the wall. PSG were getting closer. Five minutes into the second half, following a stirring rendition of La Marseillaise and much waving of tricolors by their fans, PSG took the lead. The goal, inevitably, came through the middle. Ibrahimovic's touch had been teeing up his team-mates all evening and he threaded a superb pass here, sweeping the ball through for Pastore. The Argentine had timed his run perfectly, comfortably onside and then showing such composure in lifting the ball left-footed past Valdes. Dismay spread through the tiers of Barcelona's support. Their mood lifted when they spotted Messi adjusting his shin-pads and then emerging to warm up. He came on for the disappointing Fabregas after 62 minutes, making an impact within nine. Barcelona immediately had more belief. The fans had settled, emitting more positive vibes. Messi collected the ball just outside the area, advanced and flicked a delicate pass into the heart of PSG's defence for Villa, who helped it back to Pedro. His response was exceptional, the ball rifled past Sirigu. With eight minutes remaining, Ancelotti sent on Beckham, withdrawing Verratti. Vilanova made an understandable defensive change, removing Villa and putting Alex Song in midfield to disrupt the supply-line to Ibrahimovic. Beckham was operating deep, slipping one good ball down the line to Jallet but then being totally caught out by Xavi's movement. Mistakes were now creeping into PSG's play. They had given so much. Lucas Moura fouled Busquets. Thiago Silva fouled Messi. Jallet pushed over Pedro. PSG's defence was then exposed by a delicate turn from Iniesta, who eluded Jallet so elegantly but shot into the side-netting as Camp Nou chanted his name. The turn from Iniesta deserved a standing ovation. It was that good. PSG had a final chance but Valdes was equal to Ibrahimovic's header. Barcelona were through.