Thomas Muller knows Schalke will be out to upset Bayern Munich at the Veltins Arena after going six matches without a win.
Bayern Munich forward Thomas Muller says his side's return to Bundesliga action after the international break will be "decisive" in their quest to retain the title.
The champion begins a sequence of eight fixtures in the space of a month with a difficult trip to Schalke, where it will face a side who have not won in its last six matches in all competitions.
Schalke, though, has lost just once at Veltins Arena in the league this season, and Muller expects Andre Breitenreiter's side to be hungry for a scalp.