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.