Brazil coach Luiz Felipe Scolari revealed on Thursday that he has a long list of 50 potential candidates in mind for his squad that will go into the 2014 World Cup on home soil.
"Our staff are keeping an eye on 50 players all over the world as we try to build the best possible team for the World Cup," said 'Big Phil', who was speaking at a teleconference.
Scolari, who led Brazil to glory at the 2002 World Cup, and recently returned to the job for a second spell following the sacking of Mano Menezes, announced his first squad earlier this week for the friendly against England at Wembley on February 6.
It included Ronaldinho, now 32 and playing his club football at home with Atletico Mineiro, but there was no place for Kaka, whose career has nosedived since his move to Real Madrid in 2009.
"We are not just trying players out for the sake of it, we need to be sure that their experience counts," Scolari added.
"If a player is in the right shape, he will be given opportunities."
The former Portugal and Chelsea coach admitted that Brazil are "the favourites" to win a sixth World Cup, and a first on home soil.