The signing of Martínez, who will be 34 next week, raises questions over the future of Robert Sánchez. Sources believe the Spaniard is unlikely to accept losing his spot as No 1 and may need to be moved on before the window shuts on Tuesday night. Martínez is out of favour at Villa after the arrival of Zion Suzuki and is due to sign a two-year contract with the option of a further year.

Chelsea now face the task of deciding what to do with Mike Penders, who was expected to challenge for the No1 shirt this season. There is a feeling that Penders could leave on loan, with the highly rated 21-year-old Belgian having spent last season on loan at Strasbourg.