Manchester United have officially confirmed the signing of 18-year-old defender Diego Leon from Cerro Porteño.United originally struck a deal for Leon in December after agreeing a fee worth up to

Diego Leon has promised to "give his best every day, in training, on the pitch, and off it" after his move to Manchester United was confirmed.

Manchester United have completed the signing of teenage full-back Diego Leon from Paraguayan side Cerro Porteno. United secured the deal for the 18-year-old for a $4m fee with up to $5m in add-ons based on first team achievements, after completing a pre-contract deal in the winter window.