BRAZIL are reportedly concerned Neymar could be out for the ENTIRE World Cup.
The 30-year-old was substituted during their opening game against Serbia due to an ankle injury.
And it was subsequently confirmed he had sprained it, although Brazil's medical department have maintained it will only keep him out until the end of the group stage.
Brazil kept up their perfect start without their talisman on Monday as Casemiro's goal handed them a 1-0 win over Switzerland.
But they may have to get used to the absence of Neymar as reports from South America, via The Mirror, are suggesting he may have suffered ligament damage.
This would mean the injury is worse than first feared and could jeopardise his participation in the rest of the tournament.
He is already a doubt for their last 16 clash - which would come on Monday providing they win their group.
Brazil are the favourites to lift the World Cup in Qatar on December 18.
And Neymar was hoping to make history in the Middle East by becoming Brazil's all-time leading goalscorer.
He is currently just two behind Pele having netted 75 times in 122 appearances.
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But World Cup fitness issues are nothing new for Neymar - who has had his fair share of bad luck at major tournaments.
At the 2014 World Cup, he was impressive for Brazil but then injured his back in the quarter-final and did not feature in their 7-1 defeat to Germany.
Four years later, he came into the World Cup with fitness problems and failed to fire as Brazil were eliminated by Belgium in the last eight.
