The 39-year-old Dutchman's performances have been of their usual top quality, leading to the belief he will sign another one-year contract.
There are even rumours of a possible return to international football with Holland at next summer's World Cup - when he will be only four months short of his 40th birthday.
"I don't know his plans," said Sir Alex Ferguson.
"When you get to that age and have a young family, there are a lot of things to consider.
"It is usually sometime in December that he outlines his plans and how long he thinks he can go on.
"He is a very intelligent man, who understands his body better than anyone. He will come to the right decision."
Sir Alex is equally confident of the future when van der Sar bows out.
"I have said all along, Ben has terrific ability," the manager stated.
"He needs plenty of game experience, which he has not got at the moment, but the future rests with him and Tomasz.
"The two of them will fight it out, I am sure of that."
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Showing comments 1 to 11 and replies | View All
Big Ben, Tock Tick (25/11/2009 at 12:19)
Still with no money in the pot I suppose he will have to do.
A Manc and blue (25/11/2009 at 13:12)
Greef, Salford (25/11/2009 at 13:14)
Scholesy passed me the ball..., England (25/11/2009 at 13:18)
Gilly, Belgium (25/11/2009 at 14:10)
Clustim, Swigging Super Bock, Algarve, Portugal. (25/11/2009 at 14:16)
roykeane, i always wanted to play for city (not!) (25/11/2009 at 15:43)
Fosters garbage. Kitkats a good no.2
Happy Valley Barry, San Francisco, California (25/11/2009 at 16:57)
and all the other greats that defied age, numbers and stereotypes.
If you have game, play it!
Up the Reds!
LEASE ON COUNCIL HOUSE IS 200 YEAR'S ?, MANCHESTER (25/11/2009 at 19:22)
Debbe, USA-Tennessee (26/11/2009 at 05:16)
I LOVE VAN DERSAR!!!BUT SIR ALEX IS NUTS FOR KEEPING BEN FOSTER...HE IS NEVER GOING TO CUT THE MAN U GRADE. SELLL HIM..HE HAS BEEN BAD IN ALL GAMES..HE IS LIKE A SKTTISH CAT...HE DOES NOT EXUDE CONFIDENCE WHICH TOP CLUBS LOVE TO PICK HIM APART..
DIASSPOINTING GAME,,BAD SELECTION --SCARED WE WILL LOSE IT ALL THIS YEAR IF SAF DOESNT SPEND SOME OF RONALDOS MONEY...AND VIDIC SHOULD BE A ONE TO HOLD ONTO...HE IS RIGHT FOR THE CLUB....GREAT ATHLETE..LAST YEAR HE GAVE HIS ENTIRE BODY TO THE CLUB AND JUST BECAUE HE HAS BEEN INJURED-GIVE HIM A BREAK AND PRAISE....REMIBACALL USA AVID AVID FAN OF MANU
dennis laws backheel (26/11/2009 at 09:28)
Just needs to open his mouth to cover the goal!