According to Correio da Manhã, Porto is concerned that a club could trigger Diogo Costa's release clause late in the window, and Bayern Munich has been linked.

Porto are unlikely to accept a lower fee for Diogo Costa due to his strong performance at the World Cup and because clubs like Bayern Munich and PSG have also been linked with the goalkeeper.

Bayern Munich views Diogo Costa as a potential replacement for Manuel Neuer, who is considering retirement at the end of his contract this season. The club is determined to compete for Costa's signature.

Bayern Munich are very interested in the Portugal international Diogo Costa. Bayern really like the player as they make a Neuer replacement a priority. Porto are not keen on letting Costa go, and it could take offers in the region of €70m to persuade them to let the 25-year-old leave the club.