Atletico Madrid have reportedly told Joao Felix he is able to leave if a suitable offer arrives - placing Manchester United, Liverpool, Arsenal and Newcastle on red alert.
Felix's game time has been hit by the return of old favourite Antoine Griezmann to the Wanda Metropolitano, and a series of injuries have also derailed his season.
And now, according to AS, club president Gil Marin has told Jorge Mendes, Felix's agent, that if a big enough bid is tabled then the wonderkid will be able to go.
The playmaker, 22, was left on the bench for Atletico's crunch Champions League group stage clash against Porto - and it has not been ruled out that he leaves soon.