Arjen Robben scored on his return from injury as Bayern Munich beat Cologne to become the first team to win their opening 10 Bundesliga games.
Pep Guardiola's side increased their lead to 10 points in their bid for a fourth successive German title.
Robben, 31, scored with an individual effort after 35 minutes and Arturo Vidal added a second before half-time.
Robert Lewandowski's 16th goal in nine games and a Thomas Muller penalty sealed a 1000th Bundesliga victory.
Bayern were rarely stretched as they returned to winning ways after their first defeat of the season at Arsenal in the Champions League on Tuesday.