The former Ajax coach took the job this week.
"You can see the way they were playing in the Champions League, not only this season but prior to this season, the way they have done in the leagues," Elanga told Sky Sports of Ten Hag's credentials.
"He has got a fantastic record in Europe and the way he has developed young players, players that I have played against in the youth team as well as in the national team. I have got kind of an idea of what he can bring to the team, and I am really excited to work with him."
When asked if he had spoken to fellow professionals about what to expect from the new United manager, Elanga added: "I have actually! I have spoken to some of those players, when I played against them in the U17 Euros, so I have had a chat with them. All positive."
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