When asked if the coach should consider a move to United, Van Gaal said the coach should think twice.
I think Ten Hag is a great coach, I have said that many times, Van Gaal said at a news conference Monday.
A good coach is good for Man United. Man United is a commercial club. It's difficult for a coach to make those choices. You should prefer a football club as a coach.
During his first summer in charge of United in 2014, Van Gaal was not happy with the preseason tour plans, complaining that there was too much focus on making money and not enough on preparing the players for the new season.
He said at the time that having to fly a lot and the jet lag is not good for a good preparation.
After winning the FA Cup in 2016 he was replaced by Jose Mourinho.
Ten Hag is one of four names on United's short list to be their next permanent manager.
According to sources, United believe the Dutch would be a good fit at Old Trafford, but they have not made a decision on who will be the next manager.
He will call me if he wants that. We talk to each other. He should choose a football club.