Despite receiving rave reviews in Lyon, Umtiti has always struggled to recapture way that made him one of the best defenders of Ligue 1.
United were initially tied to a move to Umtiti at the start of the 2019/20 season, but the change did not materialize and the Red Devils chose not to sign any quarterbacks.
The Frenchman now finds himself at a disadvantage at Barcelona, far down the hierarchy but still bound by a £43m termination clause that has prompted some clubs to end their interest.
Umtiti’s current contract does not expire until 2023, but Barcelona would not object to letting him go as a way to raise funds for its own transfer transactions.
One of the continent’s most talented central defenders, Real Madrid are keen to let Varane go after a decade at the Santiago Bernabeu.
Carlo Ancelotti’s recent arrival as Los Blancos coach could only continue to favor United, with comments Varane made about life under the Italian for the first time recently coming back to the fore.
Varane said: “Since he left, I’ve improved. Maybe I could have played with him more if I could have shown he he could count on me in difficult times.