Man United are believed to have identified Ten Hag as a leading candidate to become the club's new head coach ahead of the 2022-23 campaign.
Van der Sar has said that the speculation surrounding Ten Hag shows that the Dutch giants are "doing something well".
"This means that we are doing something well," Van der Sar told RTL 7. "It's the same with the players. When we perform well, the interest comes.
"If there is interest in our players or coach... we've all been blown away in the past. So be it, we have to make sure we're ready by then, that the lists are filled in."
Ajax impressively reached the last-16 stage of the Champions League by winning all six of their group matches, while the Amsterdam giants are currently top of the Eredivisie table. body check tags ::