The Paraguayan starlet, who will arrive in 2025, will become the first signing of the Ruben Amorim era.
According to football transfer expert, Fabrizio Romano, the 17-year-old will join United from July 2025 when he turns 18.
The highly-rated teenager will cost an initial $4million with up to $4m in add-ons.
Romano wrote on X on Friday night: “Diego León has signed all documents to join Manchester United in 2025.
“Contracts in place for a 17-year-old left back to become a Man United player from July 2025, when he turns 18.
“Deal sealed by Jason Wilcox after South America lead scout Giuseppe Antonaccio pushed for León as a talent.
“Paraguayan LB joins from Cerro Porteno for $4m fixed fee, $1m easy add-ons, $2/3k extra difficult add-ons.”..N..>>Don’t Miss Out! CLICK HERE TO KEEP READING> >>>
United have been on the lookout for a new left-back due to the injury issues of Luke Shaw and Tyrell Malacia over the past 18 months.