Sir Alex Ferguson has urged Edwin van der Sar to ignore the dressing room pleas for him to extend his career by another season and quit while he is still on top of his game.
The 40-year-old Dutchman announced his intention to retire earlier this year.
Since then, he has maintained an impressively high standard, leading to calls from Wayne Rooney and Rio Ferdinand amongst others to abandon his plans.
However, Ferguson is fearful that Van der Sar's standards may start to slip rapidly and without warning. And the Manchester United boss is too much of a fan to want that to happen.
"If I was giving advice to Edwin van der Sar, right now, I would say retire," said Ferguson.
"He is at the absolute pinnacle of his career but sometimes, when a player gets to that age, age comes onto you very suddenly. I wouldn't want to see Edwin van der Sar in that situation. He deserves to go out at the very top and hopefully he does that."