The confrontation reportedly began as a footballing disagreement before escalating into physical aggression, sending shockwaves through the squad.
In an official statement, the club confirmed it is taking formal action over the incident. Reports suggest Neymar lost his temper with the 18-year-old during a training session on Sunday, prompting swift intervention and review by club officials.
"Santos FC informs that by determination of the presidency, an internal inquiry process was instituted immediately after the facts occurred to analyse the episode involving athletes Neymar Jr and Robson de Souza Jr (Robinho) during training this last Sunday (03/5) at CT Rei Pelé. The club's legal department is responsible for conducting the inquiry," a statement from the club read.