Brazil coach Dunga admits he is "very worried" about AWOL Inter Milan striker Adriano.
The 27-year-old was due to report back to his club on Friday following international duty, but was not on his scheduled flight back from South America.
His whereabouts is still unknown, leaving the Selecao boss puzzled and concerned.
Dunga told Tele Lombardia channel: "I don't know where Adriano is. I am very worried for him.
"He was very well while he was with us. He was calm and we worked intensively with him because he had some troubles in one ankle.
"He was not sad or depressed, but happy. He even sang and danced as he always does in the camp. I thought he was going back to Italy.
"We set a return flight ticket for him as we did with the other players. Since then, we know nothing about it. Now that rumours are going around, I am truly worried."