The new Tottenham signing scored on debut in victory over Manchester City on Sunday.
Van Hanegem told AD: “I heard that at PSV they thought he was five kilos overweight after the winter break. I thought it was not nice to say that here and there from the club, at a time when especially the previous trainer Mark van Bommel was beginning a lot of it because he would put people against each other.
"José Mourinho thought Bergwijn was fine on weight, by the way.
"That beautiful goal as a start at a new club, that is a dream start and I sincerely wish for that for the boy. That he is away from PSV will certainly feel like a relief to him."