Reliable journalist Florian Plettenberg reported via his official account on the platform 'X' that Turkish club Galatasaray has made an official offer to sign Portuguese goalkeeper Diogo Costa, valued at 20 million euros plus variables.

Plettenberg noted that Galatasaray's primary target in the current summer transfer market remains Ederson, the goalkeeper of Manchester City, but negotiations between the Turkish club and the English team have not yet resulted in an official agreement.

In light of the stalled negotiations with Manchester City, Galatasaray has begun exploring potential alternatives, with Diogo Costa being at the top of the list should the deal for Ederson fail.

The offer presented reflects Galatasaray's seriousness in securing a distinguished goalkeeper deal this summer, amid efforts to strengthen the squad before the new season begins.