Gabriel Jesus has suffered another injury blow, this time to his left eye after fracturing an orbital bone.
Playing in an international friendly 1-0 loss in Australia against Argentina, the Manchester City forward hurt himself in a challenge with club teammate Nicolas Otamendi.
He has since been ruled out of Brazil's clash with Australia on Tuesday.
Jesus, who made a storming start to his City career, saw his progress halted temporarily as he overcame a metatarsal injury.
Initial tests after Friday's game were, meanwhile, thought to show no fracture but subsequent examinations meant the 20-year-old will now fly home to Brazil for treatment.
He had reportedly lost consciousness for a moment as Otamendi's elbow struck him in the face.
Brazil coach Tite is expected to use Diego Souza as a replacement against the Socceroos at the Melbourne Cricket Ground next week.
New Argentina coach Jorge Sampaoli guided his side to the narrow win over Brazil in this, his first game in charge of the national side, with Gabriel Mercado scoring the only goal of the game on half-time.