Neymar had surgery on his left knee two years ago to repair an ACL tear and a torn meniscus, and it appears the issue has recurred.

Brazil's national team coach, Carlo Ancelotti, has previously stated that Neymar's fitness is a concern, saying that he needs to show his form over the next six months to be considered for the World Cup squad.

Santos plays every three days, which can make it difficult for players like Neymar to recover, and the team is currently struggling in the league standings, sitting 17th with relegation a possibility.

Neymar's chances of being selected for the Brazil World Cup squad are likely to be impacted by his current injury and the team's performance.