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Philippe Coutinho is a doubt for Brazil’s opening Copa America tie with Peru on Sunday night after sustaining an injury in training.

The Liverpool FC midfielder, who turned 23 on Friday, was expected to start for the South Americans after starring – and scoring – in their final warm-up game against Mexico last week.

But Coutinho went for a scan after picking up a knock, believed to be on his thigh, in training.

WATCH: Coutinho scores first goal for Brazil

Brazil coach Dunga confirmed his participation in the Group C opener was in question, but said it does not jeopardise his chances of playing in the tournament.

“All the players are available, there is no risk of cutting,” said Dunga.Brazil open against Peru in the Chilean city of Temuco before facing Colombia on June 17 and Venezuela on June 21.

IN PICS: Coutinho's Liverpool career so far