Can't help but think tonight's referee is gonna play a big part but from what I've seen maybe not as controversial as I first thought.
According to
http://worldreferee.com/referee/cakir
He refereed barca in three games. Once Chelsea where he sent of Terry in semi final. The other against Benfica where he had enough tea time was over and sent off bisquits. Then finally in 2010 when he gave both Kazan and barca a penalty each. Heres hoping for good refereeing, though wouldn't mind him working in our favor