Shinji Kagawa and Marcel Schmelzer scored to put the home side in charge before Lewandowski netted his first a minute before half-time.

Lewandowski got his second five minutes after the break and Sebastian Kehl completed the scoring after 66 minutes.

Hoffenheim's first Bundesliga goal in more than a month saw them claim the three points against stuttering Borussia Monchengladbach.

Vedad Ibisevic struck the winner - his first goal in more than half a year - in the 56th minute to end Hoffenheim's barren run in front of net, which had seen them go goalless since beating Wolfsburg on September 17.

The victory lifted Hoffenheim onto 16 points while Gladbach, who had started the weekend in second spot, remained on 17 points after their third game without a win.

Itay Shechter's second-half header secured a second straight league victory for Kaiserslautern as they defeated Freiburg 1-0.

Shechter netted the game's only goal in the 75th minute. Christian Tiffert could have doubled Kaiserslautern's advantage two minutes later but saw his penalty saved by Freiburg goalkeeper Oliver Baumann.

The result moved the hosts onto 11 points in the standings and left the visitors in the relegation zone.

Nurnberg twice took the lead at home to Stuttgart but had to settle for a point from a 2-2 draw.

The home side went ahead after nine minutes through Timmy Simons but Zdravko Kuzmanovic levelled on the hour from the penalty spot.

Phillipp Wollscheid put Nurnberg ahead again 10 minutes later only for Francisco Rodriguez to complete the scoring with six minutes to go.

New Hamburg coach Thorsten Fink was given an idea of the size of the task he has accepted as his side had to cancel out an early deficit to earn a point against Wolfsburg in his first match in charge.

Mladen Petric equalised for the home side in the 56th minute after Mario Mandzukic had given the Wolves a second minute lead in the north German derby.

Mainz's recent struggles continued as they played out a goalless draw with Hertha Berlin.

Mainz started the season with back-to-back victories in the Bundesliga but since then they have now failed to record a win in eight matches, leaving them just above the relegation zone on nine points.