Xavi complained about the match officials after Barcelona' 1-1 draw at Real Madrid in the first-leg of their Copa del Rey semifinal.
Xavi felt Cristiano Ronaldo should have been booked during the game and was unhappy with the manner of Raphael Varane's equaliser.
"The goal is an isolated play from a corner that was not a corner. The referee did not see this, but following a corner that was undeserved, the goal came.
"In addition, there was a lack of a yellow card for Cristiano which normally would happen, but ... ".
Ronaldo blocked Barca from taking a quick free-kick, which upset Barca players.