Real Madrid's sporting director Predrag Mijatovic is becoming increasingly concerned by the poor refereeing decisions that have marred several of the Spanish giants' recent matches.
Real remain in contention to clinch their third successive title after beating Athletic Bilbao 3-2 but several controversial incidents in the game upset Mijatovic.
He said after the narrow victory: "I'm happy with the team's performance and the result, but I'm not going to hide my preoccupation with the refereeing decisions that have been called against us over the past few weeks.
"I'm worried. I don't know what's happening but I don't like the situation.
"Higuain's disallowed goal was not offside, the penalty was very harsh - so was Marcelo's yellow card. That's without even mentioning the games against Atletico and Espanyol.
"It seems that there are people who do not want Real Madrid to win their third consecutive La Liga title.
"We want to believe this is all just coincidence, but too much has happened in the past few games."