Tuchel was named Germany Manager of the Year on the weekend. He spent five seasons as Mainz manager after 12 months as a youth coach at the club.
Kersting told Kicker: "For me, Tuchel is one of the warmest people ever.
"The fact that he is always described as cool and distant from the outside is a completely wrong perception.
"Perhaps because he has many things that are packaged more soberly and objectively than others."
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