Real Madrid defender Sergio Ramos was left furious following their 2-1 loss to Barcelona in the Clasico on Saturday.
Barca struck through Neymar and Alexis Sanchez while Jese came on from the bench to score a late consolation goal for Los Blancos.
Ramos, though, believes that earlier decisions by the match officials "harmed" them - particularly an incident that saw Cristiano Ronaldo barged off the ball by Javier Mascherano in the area.
"We have been harmed, the penalty was so clear," the Spain defender told reporters. "There are things that we can't fight against.
"The referee was determinant. Real Madrid played well against a hard team. It's been a long time since we saw Barcelona suffering and wasting time."
Madrid coach Carlo Ancelotti agreed with Ramos' penalty thoughts, but also praised his players for their second-half display.
"The second-half was great: we pressed and played better. We had control of the match," he said.
"I think that the penalty was so clear, only the referee didn't see it.
"I looked for the balance with Ramos in the midfield. I talked with him and he was pleased with this. I don't think that we played with three defensive midfielders.
"(Luka) Modric is not one. (Sami) Khedira and Ramos were for balance in the defensive game, but we had Marcelo, (Daniel) Carvajal and the two fowards.
"Barcelona didn't played offensively, and only had Neymar and (Lionel) Messi. It was a fantastic match in a fantastic atmosphere. Obviously we wanted to win, but it was a great test."
