One team prevailed regardless of whether it was fair or not because if the boot was on the other foot and it was Real that was in Barca's posistion with say Xavi being sent off and them going into the 2nd leg 2-0 to the good then Real wouldnt be complaining then and they would be saying top Barca to stop moaning about the result etc.
Thats what I say even when its United games.