Never before in Spain has so much debate been generated about handballs.
Eder Militao's handball against Sevilla on Sunday, when Real Madrid could have also had a penalty of their own if play carried on, has caused a real whirlwind in the beautiful game.
"The handball issue could ruin football and I don't think that this is an exaggeration, because the sport doesn't understand the rules," said ex-referee Rafa Guerrero.
"There have been problems and there will be more in the future. We need to explain it well, otherwise the frustration will only continue."
For Guerrero, he believes that the decision made by Juan Martinez Munuera on Sunday was a correct one.
"He [the referee] did well. The problem is that there have been other occasions where [a referee] didn't blow his whistle and that can confuse people," he continued.
"We have a problem because it hasn't been explained well and we must simplify the issue.
"There are plenty of things one needs to consider when blowing for a handball: is the arm raised above the armpit? What is the reaction time etc.
"It must be simplified to a maximum of two elements. It's difficult for the referee to see a handball even on television, although with VAR there are fewer mistakes now. On Sunday it helped and it was fair."
Juan Andujar Oliver, MARCA's resident referee expert and a former international referee, believed that there shouldn't have been a penalty awarded to Sevilla against Eder Militao. He believes that all depends on whether it was deliberate or not.
"That and the referee's perception. He only blows for a foul if the play is interrupted," he noted.
"What's happening is that we've been whistling for penalties for handball for two years now and this only happens in Spain. The problem with referees is that they whistle what their bosses tell them to because if they don't, they're out on their asses.
"They don't look at whether or not it's voluntary, only at what the rules say. Everything starts with the voluntary nature and then you have to assess the assumptions."
Everything has changed
Joaquin Ramos Marcos, also a former referee, believes that football has changed remarkably since his era.
"This problem didn't exist in my time. There was only one handball: the one that was a penalty. Now you don't know," he commented.
"Any handball in the penalty area is a penalty, it doesn't matter if it touches his arm or whatever. Even the neighbours ask me what is a handball and what isn't - nobody knows.
"Militao's handball was [a handball], but the referee has to be able to interpret it. They want every handball to be the same and that's impossible, although the criteria should be unified and the referee should decide."