Van der Sar told manutd.com: "We were playing Aston Villa and although all the papers were talking about our unbeaten record there, it's still a hard place to go to.
"Villa are doing very well this year and they proved that they have the quality to play football and make life difficult.
"They played well but we were strong at the back. We made one or two blocks and I made a couple of saves. In the last 10 minutes we hoped they would get a little tired and we could push on and score a winner.
"We tried our best and had a couple of chances but not enough to get the win."
"We've had some tough away fixtures but we have to play everyone at some point," the Dutchman added. "We just have to make sure we stay at this distance or a little closer and then hopefully at the turn of the year we can push on."