Manchester United have two goalkeeper signing options on standby.
United aim to bring in a new keeper once Dean Henderson agrees a move to Crystal Palace.
Altay Bayindir, 25, at Fenerbahce and Odysseas Vlachodimos, 29, with Benfica both have agreements with United.
Fanatik says United have offered 7m plus bonuses to buy Bayindir, who has taken a medical in Athens.
Sky Sport Germany reports United have reached a verbal agreement with Vlachodimos over a contract until 2028.
Benfica want around 15m for the Greece goalkeeper. Erik ten Hag wants Vlachodimos, but a final decision has yet to be made as Bayindir is still up for grabs.