According to Correio da Manhã, United have identified Portuguese goalkeeper Diogo Costa as a potential replacement for Onana. United’s scouting network has already been deployed to monitor Costa’s performances. Representatives from the club were recently present at Estádio do Dragão to observe the 24-year-old in action during Porto’s match against Famalicão.

The chase for Costa's signature is not limited to the red half of Manchester, though, as City are also reportedly preparing a move for the Portuguese shot-stopper as they consider reinforcements to cover for Ederson, who has struggled with recurring injuries this season. Pep Guardiola’s side are expected to initiate formal talks soon, with a €58 million offer reportedly in the works.

Porto president André Villas-Boas is well aware of the growing demand for Costa and is reportedly prepared to sanction a move - but only on his own terms.