Hertha Berlin ended a week to forget when they slumped to a 1-0 defeat at Bochum while Bayern Munich suffered a shock defeat at Mainz at the weekend.
Having been the surprise package of the Bundesliga last season when they led the table going into spring, Hertha suffered a Europa League set back when they lost 2-1 to Danish club Brondy on 20 August in their first-leg qualification tie.
And a free-kick by Bochum's Anthar Yahia in the 47th minute gave the home side a much needed win which leaves them on four points, as Berlin lost their third game in a week.
The defeat leaves Hertha with three points after three games following their win against Hannover on the opening day of the season, while they were beaten by Borussia Moenchengladbach last weekend.
"We didn't get into the game and Bochum had us under control," said Berlin captain Arne Friedrich.
On Saturday, Bayern Munich were humbled 2-1 by newly-promoted Mainz, while the Bayer Leverkusen routed Freiburg 5-0. On Friday, Felix Magath's Schalke lost their 100 per cent record when they were held to a 0-0 draw by Hoffenheim to go second in the table.