Berlin: A resurgent Schalke are relishing hosting Bayern Munich, whose coach Carlo Ancelotti has faced criticism from one of his former mentors, on Tuesday.
Schalke have won three of their first four league games, including beating Champions League contenders RB Leipzig, under new coach Domenico Tedesco, who is only 32.
They are fourth in the table, one place below Bayern, who have an identical record of three wins and a defeat but are third on goal difference.
A win in Gelsenkirchen could put Schalke top as current leaders Borussia Dortmund play Hamburg on Wednesday, the same day second-placed Hanover are at Freiburg.
