Barcelona coach Xavi insists they've been hurt by refereeing decisions this season.
Xavi was speaking ahead of Tuesday's Champions League clash with Porto.
He stated: It is obvious that we would go into games calmer if we were four points ahead of the leader before Girona play.
We have not had luck with the refereeing, and it is not an excuse.
"Later on you will say it's an excuse, but we have to play better, that's why we didn't win [on Saturday]. But refereeing errors have damaged us, too. So far we haven't had any luck."