"Of course, he asked me about Germany," Rudiger told reporters at Wembley Stadium.
"It was just a general question from him to know, because he is still young. I can advise him. But at the end of the day he decides about his future.
"He can develop as well here. You can see it from both sides. Of course, he can develop in Germany as well and don't forget Bayern Munich is also a big club. It is something he needs to decide for his future. I wish him all the best, but for me I just wish he stays with us.
"We don't need to speak about him too much. He is good, everyone knows that, everyone can see that. But he is still 18 and at that age you can't look too far ahead. People have to give him time. For me he is an upcoming star, but he still needs to work hard.
"Of course, as a young player it's very important to play. Where it is? I hope it will be here."