Striker Neymar had a heated exchange with a fan after his late goal was excluded, his club Santos convicted for a 2-1 defeat and she left a relegation zone in the Brazilian Sereger.
The 33-year-old, who has had a frustrating time this year since his return to his boy's club, went to the stands with Internacional on Wednesday evening at the end of the game to talk to a fan who seemed to protest with him.
Videos showed Neymar agitated and gestures and then raised a thumb while a teammate sends him away.
Santos had insisted on a comeback of two goals with Alvaro Martin Barreal scored a minute in extra time. Three minutes later, Neymar thought he had scored with a left shot and celebrated for cheering home fans.
But angry about Vila Belmiro Stadium when the referee ruled that the ball was not exceeded the line.
Santos are 17th in the 20-Club League, where the bottom four were relegated to series B at the end of the season.
The former Barcelona and Paris Saint-Germain player has had a scorching time since the return: offside with injury, sent for a handball and suffering Covid-19.