Berlin, Dec 8 (IANS): Pep Guardiola's side cruised to an emphatic 7-0 victory at Bremen whilst Bayer Leverkusen defended their second place courtesy Heung Min Son's winner to inflict on Dortmund their fourth loss of the season in the 15th round of German Bundesliga.

Leaders Bayern Munich staged a seven-goal fest at Bremen to record their 13th victory Saturday, reports Xinhua.

The German record champions needed 21 minutes to break the deadlock as Assani Lukimya's own goal cleared the way for Bayern's victory. The Bremen defender deflected Franck Ribery's square pass into the box into his own goal.

Just seven minutes later, Daniel van Buyten doubled the lead following a dead ball situation to shock the hosts.

Bremen tried to respond but neither Nils Peterson nor Aaron Hunt were able to make use of their chances. Meanwhile, clinical Bayern made it three with their third chance as unmarked Ribery finished a combination via Thomas Mueller at the back post seven minutes before the break.

Relentless Bavarians started where they left off as Ribery teed up Mario Mandzukic for the fourth. Mueller extended the lead to 5-0 when he volleyed home Mario Goetze's chip inside the box.

Frenchman Ribery wasn't done as he scored the sixth goal to sew up his brace before Goetze scored the final to make it 7-0

Bayern cement their top position with 41 points while Bremen drop to 14th position.

Juergen Klopp's men lost the battle for the second place as Leverkusen sealed a decisive 1-0 win on the road.

Elsewhere, Hannover lost their seventh match in a row on the road as Stuttgart wrapped up a 4-2 win.

Sven Schipplock and Roberto Firmino ensured Hoffenheim's 2-1 win at Frankfurt and Raul Bobadilla's winner secured Augsburg a 1-0 win over Hamburg.