Lowly Energie Cottbus stunned Bayern Munich 2-0 yesterday, handing the Bundesliga leaders only their second defeat in 24 matches this season.
Serbian striker Branko Jelic scored two first-half goals to lift the home side off the bottom of the table with only their fourth win of the season.
With 10 matches remaining, Bayern have 50 points, five more than Hamburg SV, who moved in front of Werder Bremen into second with a 1-0 win against Borussia Dortmund. Bremen host VfL Wolfsburg today.
Bayern sorely missed defender Martin Demichelis, who was disciplined by Ottmar Hitzfeld and left behind in Munich on Friday after refusing the coach's request to play in midfield.
"It was a disastrous day," Hitzfeld told Premiere Television. "I had a feeling after 10 minutes it'd be difficult. We weren't aggressive enough and let them have far too much space. There were just too many defensive lapses."
Jelic put Cottbus in front in the 18th minute, slipping in unmarked between defenders Lucio and Daniel van Buyten to tap in an Ervin Skela cross from the right.
Cottbus goalkeeper Gerhard Tremmel blocked a controversial Franck Ribery penalty 11 minutes later. Italy striker Luca Toni went down in the box after brushing against a Cottbus defender.
Jelic doubled Cottbus's lead in the 38th minute, getting a through ball from Stiven Rivic, out-sprinting Lucio and calmly beating goalkeeper Oliver Kahn with a fine shot to the far post.
"We're under a lot of pressure," said Cottbus coach Bojan Prasnikar. "We'll take a lot of self-confidence with us from this.
"We were able to minimise our mistakes against Bayern and everyone played with heart. The first goal gave us a big lift."
Lethargic Bayern
Hitzfeld said the seven-point lead Bayern took going into the weekend may explain the lethargy in Cottbus. The hosts had more chances for a third goal than Bayern did for a first.
"It's possible some people were thinking we've already got the championship in the bag," said Hitzfeld after only the third defeat this season in all competitions. "The concentration just wasn't there."
Bayern were beaten twice last season by last-placed clubs.