Manchester United legend Ryan Giggs says finding a replacement for Sir Alex Ferguson will be difficult.
Giggs is convinced Ferguson could remain in his job for a further "four or five" years, when the Old Trafford hierarchy eventually meet to appoint a successor, the test will be stiff indeed.
"It is a massive challenge," said Giggs.
"We are talking about the most successful manager ever.
"He is constantly evolving, trying to get the age of the team right, so that will help the next manager.
"Also, you normally take over when a team is struggling but hopefully this team will be in good shape.
"It's not impossible but it is going to be tough."
