Lucas Barrios scored one goal and created the other Saturday as Bundesliga leader Borussia Dortmund won 2-0 at home against St. Pauli.
Barrios controlled Nuri Sahin's cross with his left foot before turning and slotting the ball with his weaker right past goalkeeper Thomas Kessler.
St. Pauli defender Ralph Gunesch was unlucky to knock a cross from Barrios into his own net in the 49th.
"It was a deserved win," Dortmund defender Marcel Schmelzer said. "I'm happy we could finally win in front of our fans again. We go week by week and will see what comes out of it at the end."
Mario Gomez's 18th goal of the season helped Bayern Munich to a 3-1 win at Mainz that lifted the team into provisional second place.
Germany's top scorer got Bayern's third goal in the 77th minute, following goals from Bastian Schweinsteiger and Thomas Mueller.
Sami Allagui scored a consolation for Mainz in the 84th, when he powered a header past substitute keeper Joerg Butt.
Borussia Dortmund is 13 points ahead of Bayern and Bayer Leverkusen, which plays Stuttgart at home on Sunday.
Poor defending gifted Bastian Schweinsteiger his third goal of the season in the ninth minute after buildup play from Franck Ribery and Arjen Robben. Ribery's cross was headed back into the area by the Dutchman, and Schweinsteiger headed past Heinz Mueller with ease. It was his first league goal from a header.
Mainz forward Andre Schuerrle's attempted lob over goalkeeper Thomas Kraft was just wide of the far post in the 27th, and Kraft stood up well to a free kick from the same player minutes later.
Heinz Mueller's quick reflexes denied Schweinsteiger from close range after the break, following a free kick from Robben.
Thomas Mueller got the better of his namesake in the 50th, when he stretched to reach Robben's hopeful ball forward to prod to the right of the goalkeeper.
"We played well on the counter attack," Thomas Mueller said. "It was a fight but we deserved to win."
He provided the assist for Mario Gomez to knock it in from close range, before Allagui's late consolation goal.
Hamburger SV won 4-0 against Werder Bremen, with two goals from Jose Paolo Guerrero. Freiburg beat Wolfsburg 2-1, Hannover beat Kaiserslautern 3-0, and Hoffenheim and Cologne drew 1-1.
Some 7,600 St. Pauli fans made the trip from Hamburg, to see Dortmund end their side's unbeaten start to 2011.
Dortmund had 14 shots on goal in the first half, compared to one from the visitors.
Roman Weidenfeller denied Fin Bartels from pulling a goal back for St. Pauli with half an hour remaining, after some neat interplay between Charles Takyi and Marius Ebbers, and Kevin Grosskreutz missed a great chance at the other end when he scuffed his shot narrowly wide.
"It was an abominable display; disastrous, dismal," St. Pauli coach Holger Stanislawski said. "There were too many total failures."
Mladen Petric gave Hamburger SV the lead in the 94th Northern Derby against Werder Bremen in the 42nd, volleying a cross from Jonathan Pitroipa past goalkeeper Sebastian Mielitz.
Per Mertesacker was at fault for Hamburg's second in the 64th, when Petric dispossessed the defender in front of the penalty area before feeding Guerrero for a simple tap-in.
Guerrero's second in the 79th compounded the misery for Werder coach Thomas Schaaf, and Aenis Ben-Hatira completed the rout in the 87th.
"Unfortunately we were unable to build on what we showed in the first half. Then the goal came and we had to come from behind again. If you then concede a second goal, the belief suffers a bit, your self-confidence is not flowing. We have to keep working on it," said Schaaf.
Bremen remains in 14th, one point above the relegation playoff place.
Papiss Demba Cisse scored the winner as Freiburg came from behind to beat Wolfsburg.
Patrick Helmes opened the scoring with his first goal for Wolfsburg in the 28th, but substitute Stefan Reisinger was on for less than two minutes before he equalized after receiving a pass from Anton Putsila. Wolfsburg protested as Putsila clearly controlled the ball with his hand, but referee Robert Hartmann allowed the goal to stand.
Cisse showed his class in the 70th, when - surrounded by three Wolfsburg defenders - he controlled the ball twice in the air before blasting past Marwin Hitz for his 16th of the season.
Two goals from Jan Schlaudraff and one from Mohammed Abdellaoue earned Hannover its win at home to Kaiserslautern, to move Mirko Slomka's side to third, pending Bayern's result at Mainz.
"Our target for the season was to reach 40 points as soon as possible. Nobody thought it would happen so quickly," Hannover coach Mirko Slomka said. "Of course we want to defend our position in the top five."
