Sao Paulo - Barcelona striker Neymar injured his hip while training with Brazil's national team and is listed as doubtful to play in Saturday's friendly against South Korea.
Neymar fell to the ground after a challenge with Lazio midfielder Hernanes in Seoul on Thursday. He remained on the ground as doctors rushed to attend to him but walked off the field on his own, although visibly in pain as he was taken to the locker room.
Brazil doctor Edilson Thiele told the Brazilian UOL website that it was too early to know the extent of the injury.
Zenit forward Hulk replaced Neymar among the starters for the remainder of the training session.
Brazil will also play Zambia in Beijing on Tuesday.