Barcelona has already pulled off a seemingly impossible comeback to stay alive in the Champions League.. Now they must do it all over again. Barcelona hosts Juventus on Wednesday, needing to overturn a 3-0 defeat from the first leg to advance to the semifinals of Europe's top-tier tournament. If Juventus scores first, Barcelona will find itself needing five goals. Lionel Messi and teammates have one big straw to clutch: their remarkable 6-1 victory over Paris Saint-Germain in the last round to become the only team to ever overturn a 4-0 first-leg loss in the history of the competition. That rout included three goals after 87 minutes were up. Barcelona manager Luis Enrique is trying once more to rally his players to the challenge, and let Juventus know that his team will be in all-out attack mode. "We will fight until the end. I am sure that at some point we will be close to pulling it off," said Luis Enrique. He added, perhaps only half jokingly, "we will risk it all, even up to fielding eight forwards. "We have nothing to lose after all." Barcelona, however, has given few signs that it can put on another great performance. Since roaring back against PSG, it has lost three times in seven matches and struggled to beat Real Sociedad 3-2 at home on Saturday. And former champion Juventus may prove a much tougher side to break down than PSG at Camp Nou. Juventus could be without forward Paulo Dybala, who scored two goals against Barcelona in the first leg. The Argentina international limped off early in the second half of Juve's 2-0 win at Pescara with an ankle injury. "He's taken a knock and twisted it a little but there's still four days, we have to be optimistic," Juventus coach Massimiliano Allegri said. Allegri promised Juventus wouldn't fall into the same trap of sitting back against Barcelona on Wednesday — an approach that doomed PSG. "Our aim is not to score just one goal, but to get at least two," Allegri said. Barcelona will get Sergio Busquets back after he was suspended from the first leg.
