Leeds United have been warned they should only look to do a deal for Dean Henderson if Manchester United are willing to sell the goalkeeper.
The Whites have been credited with an interest in the 23-year-old, who is currently playing second fiddle to David De Gea at Old Trafford despite starring on loan for Sheffield United last season.
Henderson is said to be looking for a loan move in January so he can cement his place in the England squad ahead of next summer's Euros.
Yet former Leeds goalkeeper Martyn says Leeds should not be looking for a simple loan deal.
Speaking to the Boot Room, Martyn agreed that Henderson would be a good signing for the Whites.
Yet he argued that loaning Henderson without looking to purchase him would risk upsetting current goalkeepers Illan Meslier and Kiko Casilla too much.
Martyn said: "He would be a good signing, given how well he played for Sheffield United.
"It would be harsh on Meslier, but he’s only 20. He’s one for the future. I’d like a more senior goalkeeper, but there is no reason to change it.
"If they go after Henderson, it’s worrying for Casilla.
"It means he is not turning to him, and if you’re trying to get Henderson on loan – it needs to be with a view to buying it. If Man United don’t want to sell, you’re upsetting your goalkeeping department.
"If they were in to buy him, and Man United were to let him go – I would be happier that route. To get him on loan it doesn’t send the best vibes to Meslier, it says to Kiko that you aren’t good enough."
