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Manchester United has confirmed the arrival of teenage defender Diego Leon from Cerro Porteno, for an initial fee of £3.3 million ($6.9 million) that could rise to £7 million ($14.6 million).

United agreed the transfer in January, but Leon was unable to make the move until he turned 18 in April.

The left-back, who has appeared for Paraguay Under-20 on nine occasions, made 33 senior appearances for the 34-time Paraguayan champion.

A United statement revealed that Leon "will be supported by our first team and the Academy whilst he settles into life in Manchester".

While Leon is expected to represent United's under-21 team, the potential exit of Tyrell Malacia could also see him serve as back-up to first-teamers Luke Shaw and Patrick Dorgu.

Leon is United's second signing of the transfer window, after it completed a £62.5 million ($130.1 million) deal to acquire Matheus Cunha from Wolverhampton Wanderers in June.

It remains in talks to sign Bryan Mbeumo from Brentford for a similar price and has also been linked with Aston Villa's Ollie Watkins.