Reigning Bundesliga champions Bayern Munich crushed promoted Arminia Bielefeld 4-1 on Saturday, while Borussia Dortmund struggled in a fierce 1-0 win over Hoffenheim.
Thomas Müller and Robert Lewandowski scored twice for Bayern. And the latter can already say that he has scored against all 18 Bundesliga teams.
Japan's Ritsu Doan scored Arminia's only one, when Bayern relaxed half an hour from the end.
The Bavarians finished with 10 men after Corentin Tolisso was sent off for knocking down Fabian Klos as last defender.
For their part, Dortmund - who had not won any of their last five duels with Hoffenheim - managed to add thanks to Erling Haaland, who came on as a substitute and gave Marco Reus an easy goal at point blank range (76 minutes).
Coach Lucien Favre decided to keep Haaland, Reus, Jude Bellingham and Raphaël Guerreiro on the bench to start, and Hoffenheim had the best chances in the first half.
Reus and Haaland finally came in for the ineffective Jadon Sancho and Julian Brandt in the 64th minute, followed by Bellingham and Guerreiro.
Hoffenheim played without Andrej Kramaric and Kasim Adams after they tested positive for coronavirus.