The most expensive full-backs ever and the record Man Utd could need to break to sign Lewis Hall

It is 10 years since Manchester United broke the world transfer record to sign Paul Pogba for £89 million. More United NewsHowever, one transfer record that United may need to break is the record fee for a full-back. Getty ImagesWorld record full-back fee could fallThe record fee for a full-back stands at £60 million. Should Man Utd replicate the Andy Cole / Keith Gillespie deal and use Harry Amass to lower the price for Lewis Hall? Lewis Hall is considered an elite left-back prospect, a player who is only 21 and has represented England at senior level four times.