Goalkeeper Rogerio Ceni, defender Luisao, and midfielders Gilberto Silva and Juninho were picked randomly for the tests, the Brazilian Soccer Confederation said.

FIFA said in March that all players participating in the World Cup could be subjected to surprise doping tests before and during the June 9-July 9 tournament in Germany.

The visit to Brazil's camp was headed by FIFA chief medical officer Jiri Dvorak.