The 2013 South American Youth Championship could have consequences for Italian giants Roma.
The tournament, to be staged in Argentina from January 9 to February 3, could rob the Giallorossi of two players.
Defender Marquinhos, 18, has been named in Brazil’s 27-man preliminary squad for the competition.
Meanwhile, 19-year-old Nicolas Lopez could be selected by Uruguay.
Should the duo be picked then they will potentially be unavailable for Roma’s League games against Napoli, Catania, Torino, Bologna and Cagliari.
Think you know your Italian football? Share your knowledge, tips and comments to win cash prizes in OLBG's World Cup tipster competition  - £10,000 to be won!