Zorc says Dortmund is a better place for Klopp to work because of the backing the club give him.
When asked about Chelsea's policy of hiring and firing, he told the London Evening Standard: "I hope not to be in this situation at any time because it means you have made many wrong decisions in this period. I think you can only have success on a long-term basis if you don't have this important position changed like you do when you change your shirts.
"I wouldn't make a ranking of where he stands among the best coaches in Europe but, for me, he is the ideal and No1 coach for Borussia Dortmund. Of course, he has to get more experience in international competition, which is what we are doing with the Champions League now."