"What is frustrating is that you are a yard away from the man that's clearly offside looking along the line and the referee's standing theother side of you and does not put the flag up, " said Jefferies.
Barcelona thought they should have been awarded a penalty in the final minute when, at theother end, Ramos appeared to trip Adriano but thereferee didn't agree.
At theother end, United were perhaps unfairly denied a penalty by referee Andre Marriner when Hernandez's shot hit the outstretched arm of a sliding Gary Cahill.