Manchester United legend Peter Schmeichel has thrown his weight behind David De Gea.
The Red Devils shot-stopper has come in for a lot of criticism in the past 18 months for his performances.
But Schmeichel believes the Spaniard can overcome this blip and go on for another decade at the top level.
He also believes there are some key differences between United's no.1 and Manchester City shot stopper Ederson.
"My basic philosophy about goalkeeping is it's impossible to say who is the best goalkeeper in the world," Schemeichel told the club website.
"You have to look at the team that they play in and the style of play.
"I always use the two Manchester goalkeepers as the example. Man City kept the ball and they need their goalkeeper to be far out of his goal and, anything that came over the top, he would deal with that. Also, he needed to be someone who could build up the game, even outside the box.
"If you swapped them over - the way we played under Jose Mourinho, could you see that Ederson would be a good goalkeeper for us? I can't see it. He's a different type of goalkeeper and David couldn't play the game that Ederson was playing.
"I really do believe that a goalkeeper needs to fit the style of play that the team is playing in."