Paris Saint-Germain forward Neymar left the pitch on a stretcher with an ankle injury during Le Classique against Marseille on Sunday.
According to Goal's Seth Vertelney, Les Parisiens were beating their rivals 3-0 when the Brazilian suffered the injury.
Kylian Mbappe and Edinson Cavani had already scored, while Rolando contributed an own goal before the Brazilian tripped during a battle with Bouna Sarr and contorted his ankle.
Neymar was in tears as he was carried off, a bad sign for the Ligue 1 giants. Their most pivotal match of the season, the return leg of the UEFA Champions League clash with Real Madrid, will be played on March 6.