Hamburg SV beat Bayern Munich 1-0 with a second-half goal from Mladen Petric to cling on to the Bundesliga leadership on Saturday.
Petric tapped in from close range in the 72nd minute after being teed up by former Bayern midfielder Ze Roberto.
Undefeated Hamburg lead with 17 points from seven matches. Bayer Leverkusen, who had briefly taken over at the top after winning an earlier match 1-0 against Cologne, are behind them on goal difference.