Porto coach Julen Lopetegui has no doubts over Danilo's commitment.
Real Madrid, Barcelona, Manchester City, Manchester United and Bayern Munich are all chasing the fullback, who has rejected a new contract offer from Porto.
Lopetegui said: "It's something perfectly natural in the career of a player, to be the object of desire of other clubs.
"But they (my players) are all 100% focused on the important objectives that we have."