Galatasaray submitted an official offer for Diogo Costa, but Porto rejected it within two minutes. According to Portuguese media, Porto will not consider any offers below the release clause of 75 million Euros.

Galatasaray has made a move to sign 25-year-old Portuguese goalkeeper Diogo Costa from Porto following Fernando Muslera's departure. The club has offered 20 million euros including bonuses for the transfer. This report was mentioned in Sky Sports DE. Costa's contract with Porto runs until June 2027, and his current market value is estimated by Transfermarkt to be €40 million. Manchester United and Manchester City have also been linked with the player.