Manchester United have paid £210million over true market value for new signings over the past decade - more than any other club in Europe's big five leagues.
The Old Trafford club have spent a total of £1.4billion on 33 players since 2012 when they were only worth a combined £1.19bn, according to a study by the CIES Football Observatory.
Their signings include the £89m purchase of Paul Pogba, then a world record fee, the £85m spent on Antony this summer and £80m to buy Harry Maguire.
Jadon Sancho, Romelu Lukaku, Angel Di Maria, Casemiro, Bruno Fernandes, Anthony Martial, Fred and Lisandro Martinez have also cost United in excess of £50m during that time frame.