Borussia Dortmund made it 11 consecutive wins from all competitions with a 1-0 victory away to Hertha Berlin in the Bundesliga on Saturday (local time).
A 63rd-minute strike from Kevin Grosskreutz proved to be the difference between the two teams at Berlin's Olympic Stadium.
Patrick Ebert missed two good chances for the home side, and they were made to pay midway through the second half.
Hertha goalkeeper Thomas Kraft pushed Robert Lewandowski's header onto the bar, and Grosskreutz produced an acrobatic finish to give Dortmund the lead.
The hosts' best opportunity to equalise fell to Raffael 10 minutes after they fell behind, but the Brazilian saw his shot blocked by Neven Subotic.
Hertha, who sacked coach Michael Skibbe last week, have now lost four league matches in succession.
Elsewhere, Borussia Moenchengladbach struck twice in the first 13 minutes of their match away to Kaiserslautern.
Patrick Herrmann and Juan Arango were the men on target for visitors 'Gladbach at the Fritz-Walter-Stadion.
Leon Jessen got a goal back for Kaiserslautern on 62 minutes, but the hosts ultimately succumbed to a 2-1 defeat.
A Stefan Kiessling brace helped Bayer Leverkusen dispatch Augsburg 4-1 at home.
Kiessling opened the scoring 25 minutes into the match at the BayArena, with Koo Ja-Cheol levelling for Augsburg four minutes into the second half.
The visitors had no answer to three Leverkusen goals in the space of 10 minutes, as Gonzalo Castro, Kiessling again, and Andre Schuerrle put the outcome beyond doubt.
Werder Bremen came away from their trip to Hamburg with all three points, courtesy of a 3-1 victory.
Marko Marin and Tom Trybull struck to give Bremen a 2-0 half-time lead.
Mladen Petric got one back for Hamburg on 76 minutes, but Marko Arnautovic made the result safe for the away side when he scored with five minutes to go.
Finally, Nuremburg left it late to secure a 2-1 victory at home to Cologne.
The hosts led through Alexander Esswein's 28th-minute strike, with Milivoje Novakovic equalising for visitors Cologne in the 65th minute.
Tomas Pekhart scored on 85 minutes to help his Nuremburg side across the line.