Thibaut Courtois has been spotted in a furious incident with his Real Madrid teammate as worrying footage has emerged on social media.
Real suffered a crushing 4-3 defeat to Barcelona in last weekend's blockbuster El Clasico.
That's despite taking a two-goal lead following a brace from Kylian Mbappe, who opened the scoring in the fifth minute before doubling his side's advantage nine minutes later.
Eric Garcia reduced the deficit before Lamine Yamal curled home a stunning strike to level proceedings. Raphinha then bagged a brace to put his side 4-2 ahead, with Mbappe pulling one back to record his hat-trick.
Barca's victory over Real moves them one step closer to winning this season's La Liga title as they open up a big seven-point gap over their domestic rivals.
It's a trophy-less season for Real, who were beaten by Barca in last month's Copa del Rey final and eliminated from the Champions League by Arsenal.
And it appears there's disharmony within the camp judging by a clip involving Courtois and Vinicius Jr. from Sunday's bruising league defeat.
A video shows Vinicius Jr. pulling the ball off Frenkie de Jong and quickly taking a free-kick.
But his wayward pass went straight to the feet of Yamal, who forced Courtois into action.
The Belgian goalkeeper made his feelings known as he could be seen berating Vinicius Jr, appearing to say 'p*ta madre'.
Courtois, who has made 46 appearances across all competitions this season, has been vocal amid his side's struggles, having called out his own teammates following their defeat to Arsenal.
After the defeat to Barca, Carlo Ancelotti, who has since been announced as the new Brazil head coach, said: "We made many mistakes that cost us the game.
"Don't forget we were missing five defenders," he added. "We competed; it was an equal game until the end."
Real have three league games to navigate before participating in this summer's Club World Cup, which takes place in the United States.