Alderweireld has been linked with his old club as PSV make their interest known.
“We have good contact with Alderweireld, but we have no concrete interest," said Ten Hag.
“We are in constant contact. Marc (Overmars, sports director) maintains close contacts with all players who have left Ajax, just look at (Davy) Klaassen.
"At the moment this is not the case."