Marca has described the incident as one of the most heated confrontations witnessed at the club's training ground, four days before Sunday's Clásico at Camp Nou.
The altercation began with an aggressive challenge during a small-sided training game — reportedly Tchouaméni on Valverde — that provoked an immediate face-to-face confrontation.
The two players pushed each other and continued a furious verbal exchange that did not end when they left the pitch. The argument carried on inside the dressing room before the situation was eventually defused, with Vinicius Júnior understood to have been among those who intervened to prevent further escalation.
The incident is the latest in a sequence of internal flashpoints during what is set to be a trophyless season at Real Madrid. Dani Ceballos was sidelined after a disagreement with coach Alvaro Arbeloa. Antonio Rüdiger was reported to have struck Álvaro Carreras during training — a version of events Carreras confirmed obliquely in a public statement, though he described it as resolved.
Kylian Mbappé's representatives issued a rebuttal this week after reports of an angry exchange with a member of Arbeloa's coaching staff during a training drill.
The broader picture inside the squad is described as alarming. Marca reports that significant divisions exist between players, with several squad members no longer on speaking terms with one another.
As many as six players are said to have stopped speaking directly to Arbeloa. The emotional weight of a season that has produced no silverware and an 11-point deficit to Barcelona in La Liga has taken its toll across the squad, coaching staff and management simultaneously.
Barcelona need only a point on Sunday to be confirmed as champions. Should they achieve it, Real Madrid will have watched their greatest rivals clinch the title at Camp Nou — the worst possible end to a season defined by injury, discord and disintegration.