BERLIN (AFP) - Bayern Munich emerged from the month-long Bundesliga winter break and were left wishing they hadn´t after losing 3-2 at Borussia Dortmund.

The champions started 2007 just three points behind leaders Werder Bremen but could end the weekend six points adrift after letting a 2-1 lead slip in Dortmund.

Borussia took the lead after 12 minutes through Swiss international striker Alexander Frei before Belgian import Daniel Van Buyen levelled for the Bavarian giants 13 minutes later.

Roy Maakay then put Bayern ahead just three minutes before the break.

However, they were always struggling to control the match and Frei grabbed his second in the 57th minute to make the score 2-2.

Borussia´s Brazilian star Tinga hit the winner two minutes later to condemn Bayern to their fifth defeat of the season.

The win was also the perfect start for new Dortmund coach Jurgen Roben who replaced Bert van Marwijk over the winter recess.

Werder Bremen host Hanover on Sunday with coach Thomas Schaaf hopeful German international Miroslav Klose will make the line-up.

Werder Bremen´s 4-2 away victory and then 5-0 win at home in their last matches against Hanover augur well for the northern port club.

And Schaaf is hopeful striker Klose will be back to full fitness.

"We will have to see how his body holds up but I´m hoping for something positive," he told the club´s official website. "It would be very important to us if he could play and it´s looking really good."

Bremen skipper Frank Baumann, who had been out of action for two months through injury, had a successful run out against Mattersburg two weeks ago and has been in full training since.

Hanover are only five points above third-from-bottom Borussia Monchengladbach in the first relegation spot.

In other matches at the weekend, second-placed Schalke 04 who are behind Bremen on goal difference, travel to Eintracht Frankfurt on Saturday and fourth-placed VfB Stuttgart visit Nuremberg.