Bayern Munich great Oliver Kahn believes his former club faced Borussia Dortmund at the perfect time, as he lauded the return of Jupp Heynckes.
Heynckes' side moved four points clear atop the Bundesliga after a 3-1 victory in Der Klassiker on Saturday.
Since the 72-year-old Heynckes returned to Bayern for his fourth stint, the German giants have won seven straight games.
Kahn feels his former club's meeting with Dortmund came at an ideal time, with Peter Bosz's men dealing with "many problems".
"I think the Heynckes effect, meaning the signing of Jupp Heynckes as head coach, was very useful," the former Germany goalkeeper told Omnisport, speaking at the Golden Foot Hublot Award in Monaco.