Former Manchester United first-team coach Rene Meulensteen has advised manager Ole Gunnar Solskjaer to replace Anthony Martial with Robert Lewandowski.
The Frenchman has impressed this season in his favoured No.9 role scoring 14 Premier League goals, but his inability to be consistent has seen him often criticised.
But Meulensteen believes the missing piece in the team is a world class centre-forward.
“They brought [Odion] Ighalo in as a player that could help United in certain times and he’s done actually very, very well,” Meulensteen told talkSPORT.
“But, if you look to the other players that have been there, [Marcus] Rashford, Martial, they’re not really out-and-out strikers, [Mason] Greenwood is a young player coming up, same thing there.
“So, there’s a lot of chances and goals that can be created coming from the wide areas in, Sancho is exactly the same player.
“What I think Manchester United is missing is a striker the calibre of Robert Lewandowksi, somebody that is up there, can hold the line, can link play, but when it comes to finishing chances in and outside of the box, that sort of player, and they are hard to come by.
“Is £50 million with Sancho, is that too much? For me, I think you look at what United have in those wide areas, is that where you want to strengthen?
“I think they need a player in that area and Sancho would be a good one, but yeah, I don’t know exactly.”