Schurrle says he spoke with his Germany teammates ahead of choosing to leave Bayer Leverkusen.
"I spoke about him with my national team-mates Sami Khedira and Mesut Ozil, who have played under him for Real Madrid.
"They both told me he is the best coach they have ever worked with.
"I don't fear suffering the same fate as Marko and just being a replacement. I will try to make my way at Chelsea."