Manchester United legend Rio Ferdinand has revealed the biggest transfer mistake made by the Red Devils.
Manchester United legend Rio Ferdinand believes Jonny Evans should have never been sold in 2015, insisting he was the club's "best defender" at the time.
Evans, who spent nearly a decade at Old Trafford, making 198 appearances and winning three Premier League titles, fell out of favor under Louis van Gaal and was sold to West Brom for £8 million.
Ferdinand believes this was a big mistake.
"He should have had another 12 years at Manchester United," Ferdinand said on his YouTube channel.
"As soon as they sold him, I said, 'Wow, who's sanctioned this? How can you let him go?' He is arguably your best defender there."
Ferdinand highlighted Evans' experience and understanding of the club's culture as invaluable assets.
"He was experienced as well, he had more experience than Phil Jones and Chris Smalling. You can't let him go," Ferdinand emphasised.
"He understands the fabric of the club. If you want to keep a culture at a club, you need players who understand it and have been there. He's one of them."
Evans returned to Manchester United last summer on a free transfer and has hardly put a foot wrong.