Former Germany and Bayern Munich goalkeeper Oliver Kahn advised Manuel Neuer to not miss the right timing to end his career. “No one wants to be booed in the stadium at the end of their career,” Kahm told the Sport Bild weekly on Wednesday. He added that if Bayern win the Champions League this season at their home Allianz Arena, “it would be the perfect time” for Neuer’s retirement. Kahn warned Germany’s long-serving number one of a possible slump in performance following his retirement from the national team after this summer’s Euro 2024. “You fall into a hole and ask yourself: What is the go…