Manchester United are in talks over signing a new goalkeeper with Aston Villa's Emi Martinez re-emerging as an option alongside Royal Antwerp's Senne Lammens on Sunday.
The possibility of Jadon Sancho going to Aston Villa has also been floated during talks as United explore all options.
Martinez was left out of Aston Villa's squad to face Crystal Palace on Sunday night as a consequence with the Argentina international pushing to leave, failing to impress his manager Unai Emery.
United are understood to have made an improved offer for Lammens of around £20m after their opening bid of £14.