Neymar and new Barcelona signing Nelson Semedo have sensationally clashed in training.
Neymar has been linked with a world-record move to Paris Saint Germain, and his walkout now looks to make that deal even more likely.
He became tangled in a challenge for the ball, with the striker squaring up to the new arrival from Benfica, reports the Daily Mail.
Javier Mascherano quickly intervenes and Semedo runs back to the game, but Neymar is clearly still unhappy, calling and gesturing after the defender, and having to be restrained by Sergio Busquets.
The furious striker then tears off his training bib and throws it to the ground as manager Ernesto Valverde stands close by.