BERLIN, Jan. 19 (Xinhua) -- Mario Mandzukic's brace ensured Bayern Munich's 2-0 win over Greuther Fuerth, Leverkusen defeated Frankfurt 3-1 and defending champion Dortmund crushed Bremen 5-0 at the 18th round of Bundesliga on Saturday.
Bayern Munich maintain their nine point gap atop the Bundesliga standings following a one-sided affair against rivals and bottom team Greuther Fuerth at Allianz Arena.
From the kickoff Bayern made clear that only three points were sufficient to satisfy their standards.
The German record champions let the ball do the work with a ball possession of over 80 percent to frustrate the visitors. Thus Mario Mandzukic converted Bayern's dominance into a tangible reward when he broke the deadlock with 26 minutes played. The Croatian international used Thomas Mueller's cross to slot home from penalty area.
Greuther Fuerth defended deep but was unable to threat Bayern Munich's defence.
After the interval the hosts sealed the deal ahead of time when Mandzukic extended his tally to 11 goals at the 61st minute. Toni Kroo's corner-cross found Mandzukic at the near post to head home for the 2-0 victory.
Bayern chasers and second placed Leverkusen wrapped three points against stunner team Frankfurt following their 3-1 victory on home soil.The hosts got hold of a better start meanwhile Frankfurt needed some time to establish their strategy.
Leverkusen's Stefan Kiessling and Gonzalo Castro worked out promising opportunities but their efforts where defused by Frankfurt's goalkeeper Kevin Trapp.
With 31 minutes into play Sebastian Boenisch capitalized on an error by Frankfurt's defence that failed to clear the ball from the box following a corner, to open the scoring.
Leverkusen doubled the lead only two minutes later when Stefan Kiessling utilized a build up play by Castro, following a fast break, to tap in his 13th goal of the season from close range.
After the break Frankfurt piled on the pressure to turn things around but Leverkusen's Andre Schuerrle made it 3-0 on the scoreboards as he exploited an assist by Kiessling to slot home inside the near post.
Frankfurt was only able to score their consolation at the 78th minute when Alexander Meier overcame Leverkusen goalkeeper Leno with a lob.
Reigning champions Borussia Dortmund taught Bremen a lesson when they trashed the Green-Whites 5-0 at Weser stadium.h Marco Reus introduced the goal spree against helpless Werder Bremen when he curled a dead ball over the wall into the top left corner to open the scoring with nine minutes played.
The host tried to respond to the early deficit but Dortmund doubled the lead 10 minutes later through Mario Goetze whoss long-range effort bounced off the bar to cross the goal line.
After the break the "Borussen" started where they left off when Felipe Santana nodded home a corner cross at the near post to make it 3-0. It was the preliminary decision but yet Dortmund was not done with the scoring as Robert Lewandowski and substitute Jakub Blaszczykowski sealed the final 5-0 score.
Elsewhere, Wolfsburg ensured the first win in 2013 for their new coach Dieter Hecking as goals by Diego and Alexander Madlung where enough to stun Stuttgart 2-0.
Hoffenheim and Monchengladbach staged a goalless draw to share points as well as Mainz and Freiburg.