Borussia Dortmund consolidated their place at the top of the Bundesliga with a 5-0 rout of 10-man Freiburg on Saturday.

Bayern Munich's 1-0 win over VfL Wolfsburg at the Allianz Arena means Pep Guardiola's second-placed side remain level on 19 points with Dortmund, but Jurgen Klopp's team have a superior goal difference.

Dortmund ran riot at Signal Iduna Park with Germany winger Marco Reus and Poland striker Robert Lewandowski scoring twice before Polish midfielder Jakub Blaszczykowski added the fifth 10 minutes from time.

"I was already happy with the first-half. We had wanted to find our rhythm from the first second, which we did," said Klopp.

"We put in a good performance and it was a lot of fun to watch."

Dortmund broke the deadlock on 35 minutes when Lewandowski's shot was blocked by Freiburg goalkeeper Oliver Baumann, but Reus was on hand to tap home the loose ball.

Freiburg's fortunes took a sharp downturn when Senegalese centre-back Fallou Diagne was sent off after hauling down Lewandowski and Reus drilled home the resulting spot-kick in the 47th minute.

Lewandowski then netted his fourth goal of the season when he held off two defenders to chip the ball over Baumann with half an hour left.

The Poland forward -- who has said he will sign a Bayern Munich contract in January with his Dortmund contract to expire in June -- then added his second when he converted a Jonas Hoffmann pass on 70 minutes.

Dortmund, who host Marseille in the Champions League on Tuesday looking to bounce back from their 2-1 defeat at Napoli a fortnight ago, added the fifth when Blaszczykowski pounced on a wayward back pass and fired past Baumann 10 minutes before the whistle.

The defeat keeps Freiburg second from bottom and still looking for their first win of the season.

Ahead of Wednesday's Champions League match at Manchester City, Bayern stuttered to a 1-0 win over Wolfsburg.

"We won, but we must improve a few things," admitted Guardiola ahead of the trip to Manchester and next Saturday's Bundesliga clash at third-placed Bayer Leverkusen.

"I am certain that we will put in a good performance in Manchester and Leverkusen."

Bayern needed an hour to break the deadlock as Germany star Thomas Mueller netted his first Bundesliga goal of the season when he met Franck Ribery's pass from the left wing at the far post.

Bayer Leverkusen stayed third, just a point behind Dortmund and Bayern, with a 2-0 win at home to Hanover 96 as Germany midfielders Simon Rolfes and Sidney Sam scored first-half goals.

Leverkusen's Sami Hyypia host Real Sociedad in the Champions League on Wednesday and deserved the win having peppered the Hanover goal with 17 shots compared to the guests' seven.

Ex-Holland boss Bert van Marwijk made his debut as Hamburg coach with a 2-2 draw at Eintracht Frankfurt as the Hanseatic side twice came from behind with Marcell Jansen scoring a late equaliser.

Van Marwijk, who steered Holland to the 2010 World Cup final, saw Hamburg pick up their first point in three matches to climb out of the bottom three up to 15th.

"From our perspective, it was a deserved point," said captain Rafael van der Vaart.

"We played with a new system, sometimes it worked, sometimes it didn't.

"We were a bit insecure at the start, but we did a better job after the break.

"I've known the coach for a long time, he has a lot of experience and I'm glad he's here."

Schalke, who are at FC Basel in the Champions League on Tuesday, were held to a thrilling 3-3 draw at Hoffenheim while Hertha Berlin moved up to fifth after coming from behind to beat Mainz 05 3-1 in the capital.