"We've been unlucky with the refereeing but that's no excuse"

Barcelona will take on Porto in a Champions League group stage match tonight and further progress in Europe's top competition is a challenge for them despite being one of the favourites to lift the trophy this season.

Spanish coach Xavi Hernandez held a press conference on Monday to dispel doubts about the potential of his squad after his side's 1-1 draw against Rayo Vallecano in La Liga.

"It's a very important game [against Porto] for us. We have a good chance of finishing top of the group. We're looking forward to it, we're waiting for our fans, we need them more than ever and hopefully it will be a magical night," he told reporters.

Coach also spoke about his team's current situation in the Spanish top-flight "We've been unlucky with the refereeing but that's no excuse."

He went on: "We have to play better. So far, we've been unlucky."