Dani Olmo spoiled Harry Kane's Bayern Munich welcome party on Saturday as the Spaniard's three goals secured a first German Super Cup win for RB Leipzig.
Marco Rose's side took the lead after just three minutes when Olmo slotted home after Bayern defended a free kick poorly, and he doubled the lead before the break with another calm finish.
The 25-year-old then made it three from the penalty spot after half-time.
Harry Kane made his debut from the bench to chants of his name around the stadium after arriving from Tottenham on Friday, but he failed to make much of an impact in a disappointing display from Thomas Tuchel's men.