BERLIN, Feb. 8 (Xinhua) -- Front runners Bayern Munich marched on as they won the Bavarian derby 2-0 meanwhile Dortmund sealed their second straight victory with a goal festival over Bremen at the 20 round of Bundesliga on Saturday.
Bayern extend their unbeaten record to 45 games as resilient Nuremberg failed to get more out of their bright start at the Bavarian derby.
The hosts caught a lively start at outsold home front when Daniel Ginczek tested Bayern custodian Manuel Neuer before Hiroshi Kiyotake's sideways scissors kick rattled the bar. The German giants seemed impressed as Josip Drmic nearly broke the deadlock, but it was again Neuer who denied the opener.
However, instead of celebrating an opener against the league leaders, Nuremberg were punished for their poor chance conversion as Mario Mandzukic opened the scoring against the run of the game at the 18th minute. The Croatian international made use of David Alaba's cross to volley home from seven meters into the top left corner.
Bayern established their rhythm as Arjen Robben and Thomas Mueller rattled the woodwork as everything pointed to another goal for the visitors.
Nuremberg hoped to grab at least one point but all their hopes were destroyed by Philipp Lahm, who exploited Mandzukic's assist to score his first goal since December 2010.
Consequently Bayern restore their 13-point lead atop the standings with 56 points while Nuremberg slumped into the relegation battle with 16th position and only 17 points.
Dortmund routed Bremen 5-1 to wrap up their second straight win, keeping the pressure on second placed Leverkusen.
The hosts from Bremen caught a better start bur Franco di Santo failed to ensure a perfect start from close range. Bremen staged a well-positioned defence but lacked in creativity meanwhile Dortmund failed to find a gap inside Bremen's bulwark.
However, things changed with the 26th minute as Marcel Schmelzer forced a turnover to set up for Robert Lewandowski, who slotted home into the far post corner.
Dortmund added another goal to their lead with just four minutes remaining in the first half as Henrikh Mkhitaryan dribbled his way through Bremen's defence to double the lead from inside the box.
Juergen Klopp men started where they left off as Manuel Friedrich headed it 3-0 on the scoreboards following his first goal for the BVB with just three minutes into the second half.
To make things worse for hapless Bremen, Mkhitaryan curled a back heel pass by Marco Reus from sharp angel past Bremen keeper Raphael Wolf to seal his brace and the 4-0 lead at the 62nd minute.
Nonetheless, the "BVB" were not done with the scoring as Lewandowski reaped his second goal when he danced through the defence to poke home into the open goal five minutes before final whistle. Bremen showed a vital sign as Levent Aycicek scored the consolation to reduce the arrears to 5-1 with one minute remaining.
Dortmund stay on 3rd place with 39 points whilst drop on 13th position with 20 points.
Elsewhere, Wolfsburg earned their 10th win of the season as they overcame Mainz with three second-half goals.
Berlin increased Hamburg's precarious situation as Sami Allagui and Adrian Ramos inflicted the "Rothosen" a 2-0 loss, the sixth straight loss.
Frankfurt cruised to a 3-0 win over bottom side Braunschweig thanks to three first-half goals and Freiburg and Hoffenheim share the spoils following a 1-1 draw.