Atletico Madrid manager Diego Simeone and Filipe Luis were involved in an angry dressing-room exchange after their Champions League quarter-final showdown against Barcelona on Tuesday night.
As reported by the Mirror, it has been suggested that Simeone was left furious after hearing of Luis' post-match interview, where the defender blasted German referee Felix Brych for sending off striker Fernando Torres.
Torres, who opened the scoring for Atletico at the Camp Nou, was later sent off for two bookable offences in the first half. Ultimately, the fouls committed by Torres cost Atletico the win as Barcelona came from behind to secure a 2-1 first-leg victory.
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However, Luis was far from happy with the sending off and also suggested that Barca forward Luis Suarez, who went on to score both goals for the Catalans, should have seen a red card.
Luis stated, as per the Mirror: “The sending off is totally unjust and changed the game.
“Barcelona are protected. When you play against them you realise that they are a very powerful club.
“You realise the fear when Barcelona could get knocked out. It would hurt UEFA a lot.
“Against Real Madrid there was a similar moment [from Suarez]. I don’t know what they have to do for someone to send one of them off.
“Fernando, two fouls, two cards. The referee has not seen many Madrid-Barcelona derbies. There would be eight red cards.
"I don't don't know what [a Barcelona player] has to do to get sent off.
“They sent me off [in La Liga fixture] correctly, but the other team isn’t treated the same. That’s what hurts.”
Luis' comments, then, could earn him a ban from UEFA, who may well take offence. With Torres already suspended for the return leg, it's not entirely surprising that the player's comments haven't gone down too well with Simeone.
The Atletico boss was far more reserved when discussing the controversy surrounding Torres' dismissal.
When asked who he blamed for the red card, Simeone stated: "Certainly not Torres.
"I can't say what I want... I need to think about what I'm saying so I don't say anything I shouldn't."
After a controversial evening, the tie is still very much in the balance, but Atletico will be well aware that they will have to be at their best on home soil to progress to the semi-finals.
Who will reach the semi-final: Barcelona or Atletico Madrid? Have your say below!