Afonso Alves' dream of playing for Brazil in the Olympics could result in the striker missing Middlesbrough's opening games of next season.
If Alves is selected, he could miss up to three league games and the final pre-season warm-up matches.
The Olympic football tournament is a FIFA-sanctioned under-23 tournament with countries able to select three over-age players.
The Evening Gazette understands clubs must release any under-23 players selected by competing nations but don't have to allow over-aged players to attend.
Alves, though, is keen to take part, saying: "I hope to get another chance with the national side and if that chance comes in the Olympics then even better."