European champions Bayern Munich went top of the Bundesliga for the first time this season on Saturday after a pulsating 1-1 draw at Bayer Leverkusen.

Bayern extended their unbeaten run to 33 Bundesliga games and are closing in on Hamburg's record of 36, set in January 1983, as the Bavarians returned to the site of their last league defeat in October 2012.

Previous leaders Borussia Dortmund lost top place after suffering a shock 2-0 defeat at Borussia Moenchengladbach earlier in the day.

In a high-tempo clash at Leverkusen's BayArena, Germany midfielder Sidney Sam's 31st-minute equaliser for the hosts came straight after Toni Kroos' opening goal for Bayern.

Leverkusen goalkeeper Bernd Leno guaranteed a point for his side by denying Franck Ribery twice in as many second-half minutes, then Mario Goetze, while Thomas Mueller had a penalty appeal turned down.

"Congratulations to my team, we played excellent football and we're top of the table," said Bayern coach Pep Guardiola.

"Leverkusen had 11 players and one of them was Leno, he may have let one in, but it could have been many more than that.

"We had 27 shots on goal, but that's football, the most important is that we're top."

Bayern took the lead when France wing Ribery found Kroos on the edge of the area and the attacking midfielder blasted home.

Leverkusen drew level when Germany goalkeeper Manuel Neuer parried Poland defender Sebastian Boenisch's shot, but the rebound fell to Sam to tap home into an empty net.

Bayern, fresh from Wednesday's 3-1 Champions League win at Manchester City, again dominated possession -- nearly 80 percent -- but were continually frustrated by some determined defending.

Germany midfielder Bastian Schweinsteiger had a late header cleared off the line, while Leverkusen's Son Heung-Min blasted wide with the final shot of the game.

The single point was enough to send Bayern top, with Leverkusen third, behind Borussia Dortmund.

Fresh from their impressive 3-0 Champions League win over Marseille, Dortmund were set to claim an away point until a disastrous final 10-minute spell.

Germany defender Mats Hummels earned a red card on 81 minutes with a reckless challenge on 'Gladbach's Norway midfielder Havard Nordtveit in the area which left referee Manuel Graefe reaching for the red card.

Germany striker Max Kruse netted the resulting penalty, then Brazilian forward Raffael hit their second four minutes from time to see 'Gladbach move up to fourth.

"That was an unusual game, we had our opponents under brutal pressure for long periods of play, but didn't score," admitted Dortmund coach Jurgen Klopp.

"We played our part in the defeat, we left the game too open and allowed 'Gladbach to come to life when they took their chances."

Dortmund dropped to second in the league, a point behind Bayern, and level on 19 points with third-placed Leverkusen.

Dortmund midfielder Sven Bender is an injury doubt for Germany's World Cup qualifiers against Republic of Ireland on Friday and Sweden four days later after being left bruised by a second-half challenge.

Schalke 04 came from behind to claim a 4-1 win over 10-man Augsburg in Gelsenkirchen to move up to eighth.

VfB Stuttgart dropped to seventh after their 1-1 draw at home to Werder Bremen while Hoffenheim, who narrowly avoided relegation last season, stayed 10th with a 2-2 draw at Mainz.

Eintracht Braunschweig, who had spent the season thus far bottom of the table since last season's promotion, picked up their first win of the season with a shock 2-0 victory at VfL Wolfsburg -- their first Bundesliga victory since 1985.

Midfielder Karim Bellarabi scored the opening goal after 30 minutes before Congo forward Domi Kumbela put the result beyond doubt with a late second.

The win lifted Braunschweig off bottom place with Freiburg, who host Frankfurt on Sunday, dropping down to last place.

On Sunday, Bert van Marwijk, the former Holland manager, is seeking his first win as Hamburg coach at Nuremberg.