The governing body has provisionally suspended Martinez Quarta after a failed drugs test, with team-mate Mayada also testing positive
River Plate duo Camilo Mayada and Lucas Martinez Quarta have failed drugs tests and the latter has been provisionally suspended by CONMEBOL, the Argentine club have confirmed.
A sample provided by Uruguay international Mayada after the Copa Libertadores match against Melgar on May 18 showed positive for the diuretic hydrochlorothiazide.
Martinez Quarta, a 21-year-old midfielder considered close to breaking into the Argentina set-up, was found to have the same substance in his system after the match against Emelec on May 10.