Paris Saint-Germain will be worried about Neymar's injury, says club colleague Eric Maxim Choupo-Moting.
The Brazil captain was withdrawn after only eight minutes of action, though replacement Richarlison went on to score the only goal of the game.
Brazil doctor Rodrigo Lasmar eased fears over Neymar's fitness, telling SporTV: "It does not appear to be a serious injury". However, he said a scan will be needed on the injury.
Choupo-Moting would stand to benefit if either attacker were injured for any length of time, but he has his fingers crossed for Neymar.
"It would be worrying because he is a very important player, as all the players are," he said, as quoted by the Daily Mail.
"No player is more important than the team. He's a great player though and I hope he is not injured for a long time.
"I talked quickly to him but it was just after the injury. I think it's not too too serious. I hope he will be ready next week for us.
"He wanted to play. He really had an injury and felt something."