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.