Real Madrid suffered another shock defeat on Sunday evening at the hands of Real Sociedad.
Willian Jose and Ruben Pardo were both on the scoresheet as Madrid were defeated 2-0 at the Bernabeu.
Lucas Vazquez was also sent off for the home team to compound a miserable day for the Spanish giants.
However, the scoreline could have been very different.
Vinicius, who was making his first start in La Liga, went down under a challenge from Gerónimo Rulli early in the second half.
The referee waved play on and didn't even consult VAR.
If VAR had been consulted and Madrid had been awarded the penalty, it would have been very likely that they would have restored parity in the game.
That incident has caused outrage with many connected with Los Blancos, with Sergio Ramos even calling the referee's decision not to consult VAR as 'scandalous'.
Vinicius was also unhappy about the incident and took to Instagram to complain about it after the game.
The Brazilian forward posted an image on Instagram of Rulli clearly bringing him down in the box.
Rulli saw Vinicius' complaints and responded himself, posting his own image on Twitter.
In Rulli's image, it shows he got a slight touch on the ball.
He then added in emojis which suggested that was the case.
And, a closer look of the incident does show that Rulli got a very faint touch on the ball.
So it seems that the referee was right not to award a penalty.
Luka Modric also commented on the incident after the game, saying he doesn't understand why VAR was not called for.
"We can't do anything about VAR," he said, per AS. "It's going to be there but I don't understand why it doesn't get involved in a situation like Vinicius' penalty.
"They're confused about when to use it and when it comes into play.... but that's it. That's not our problem, it's not the VAR, we have to focus on other things."