(CNN) -- Hertha Berlin stayed top of the German Bundesliga after Sunday's matches as second-placed SV Hamburg were beaten 3-1 at home by VfL Wolfsburg and Bayern Munich drew 0-0 with Werder Bremen.
The results leave Hertha, 2-1 winners over Borussia Moenchengladbach in the 22nd round, a point clear of Martin Jol's Hamburg, with Hoffenheim a further point adrift in third.
Wolfsburg move up to fourth, pushing defending champions Bayern into fifth on goal difference, four points adrift.
It was a desperately disappointing result for Bayern, who thrashed Sporting Lisbon 5-0 in midweek in the Champions League and looked to step up their faltering title challenge at Werder.
Striker Miroslav Klose and star midfielder Franck Ribery both went close, but Werder, who knocked AC Milan out of the UEFA Cup in midweek, stood firm.
Hamburg would have regained top spot with victory over Wolfsburg, but fell behind in the 12th minute as Brazilian striker Grafite fired home a penalty after Edin Dzeko had been fouled.
Grafite grabbed a second on 24 minutes, his ninth in the last six Bundesliga games.
Hamburg pulled a goal back through Peruvian striker Jose Guerrero in the 72nd minute but Wolfsburg regained a two-goal advantage when Dzeko scored just four minutes later.