The Manchester United target was warned by the coach that he must choose a football club and not a commercial club.
The coach is one of the favorites to be the next United boss, but Van Gaal says that he has a difficult choice to make about whether to come to Manchester.
Van Gaal said that it was a difficult choice for a coach to work at Manchester United. He should go to a football club.
I will not advise him, he will call me himself. He needs to choose a football club and not a commercial club.
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United want to make a permanent appointment before the summer and plan to speak to a number of candidates, with Ten Hag understood to have met with the club as part of that process last week.
The head coach of Sevilla, Julen Lopetegui, has been linked with the vacant post.
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With four games to go, United are four points behind fourth-spotted Arsenal and need to win againstLeicester on Saturday to keep their hopes of a European place alive.
Manchester City is second for total revenue in the next two years, only behind United.
Ed Woodward, the outgoing executive vice-chairman, said the top priority was success on the pitch.
The suggestion that van Dijk would prefer to play in a different formation was dismissed by Van Gaal this week.
The Netherlands lined up in a 3-4-1-2 system. Afterwards, Van Dijk said that they are playing in a new system and that different things are required of the players. We showed a lot of good things.
Do I like the system? The national coach has a very strong opinion about 4-3-3, but I still prefer it.
I know he has that preference, he always said this publicly, and I became Netherlands coach for a third time in August.
When I arrived here, we already had a debate. The manager makes the decisions.