United goalkeeping coach Eric Steele indicated earlier this week that he expected the veteran Dutchman to hang up his gloves at the end of the current campaign.
However, 39-year-old van der Sar has moved quickly to dismiss the suggestions and insists he has yet to make a decision on his future.
"That's complete nonsense. I do not know where this story comes from but it is nonsense," van der Sar told www.sport-promotion.nl.
"I don't yet know whether I will stop or continue after this season. Only in the course of this season will I think about it.
"Then I will decide and not before. For now I keep my focus on United."