He said on the Phrasenmäher podcast, via Sky Germany: "It goes without saying that we don't want to strengthen direct competitors in our own league with top players. Incidentally, I also said that directly to Jonathan Tah. I understand if you want to leave, but I would have preferred any club to one in Germany."
When asked if he could promise Wirtz wouldn't join Bayern, he said: "You can't promise anything in football. We would be happy if he stayed with us forever."
Carro added that there was a strong likelihood Wirtz would become the most expensive German transfer in history if he left.