A review of the weekend's action in Germany's Bundesliga.
Borussia Dortmund blew a two-goal lead but hit back to win 3-2 at Bayer Leverkusen and climb up to second place in the Bundesliga, trying to catch runaway leaders Bayern Munich.
Marco Reus gave Dortmund the lead after three minutes and Jakub Blaszczykowski doubled the advantage in the ninth minute from the spot. Stefan Reinartz scored a brace in the 58th and 62nd minutes to equalise only to see Robert Lewandowski make it 3-2 seconds later.
Blaszczykowski saw his second penalty attempt stopped in the 70th minute but Dortmund held on for the victory, their fourth in a row as they continue to trail Bayern by 12 points.
Leverkusen suffered their first Bundesliga loss at home this season as they dropped down to third.
Nurnberg claimed their first victory under new coach Michael Wiesinger as they beat Borussia Monchengladbach 2-1 to move further clear of the relegation zone.
Timmy Simons gave the hosts the lead after four minutes from a penalty and Tomas Pekhart made it 2-0 in the 30th minute.
Patrick Herrmann replied for Gladbach after 58 minutes.
On Saturday, Bayern Munich continued their seemingly unstoppable march towards the title with a convincing 3-0 win at Mainz.
A goal from Thomas Muller and a Mario Mandzukic brace earned the visitors three points to extend their advantage at the top of the table..
Greuther Furth picked up only their second win of the season with a shock 2-1 victory at Schalke thanks to a last-gasp goal from Nikola Djurdjic.
Michel Bastos marked his Schalke debut with a goal, but Felix Klaus levelled before Djurdjic scored a dramatic late winner for Mike Buskens' men.
The win will be particularly sweet for former Schalke player and coach Buskens and striker Gerald Asamoah, who remains a terrace hero in Gelsenkirchen.
Fortuna Dusseldorf broke their 2013 duck with a much-needed 3-1 win over Stuttgart, who have now lost four Bundesliga games in a row.
Robbie Kruse put Dusseldorf in control of the game with a brace before Christian Gentner brought Stuttgart back into the running.
Oliver Fink then sealed victory for Fortuna, who edge up to within a point of their opponents, who were unable to respond to coach Bruno Labbadia's decision to sign a contract extension during the week.
Srdjan Lakic marked his Eintracht Frankfurt debut with two goals to inspire Armin Veh's side to a 2-0 win in Hamburg.
Lakic, who arrived in Frankfurt on loan from Wolfsburg just prior to the transfer deadline, grabbed a brace in the first half at the HSV Arena as the Eagles extended their advantage over fifth-placed Mainz to six points and denied Hamburg a place in the top six for the first time all season.
Frankfurt completed the double over Hamburg, inflicting their first home defeat after four wins in a row, and boosting their hopes of playing Champions League football next season.
Hoffenheim picked up their first win under new coach Marco Kurz and their first three-point haul of 2013 after beating Freiburg 2-1.
Kevin Volland, the only player in the Hoffenheim squad to have found the back of the net since the turn of the year, was on target twice to earn them a much-needed win which lifts them back out of the bottom two and above Augsburg.
Max Kruse had put Freiburg in front before Volland's brace turned the game around and left them empty handed in a Baden-Wurttemberg derby.
Augsburg kept up their fine form in 2013 with a creditable draw at Wolfsburg, giving them further hope of retaining their Bundesliga status.
Jan Moravek earned the visitors a point with a 25th minute equaliser - two minutes after Naldo had put the Wolves ahead.
Augsburg have picked up five points from their first three matches of the new year, although Hoffenheim's victory over Freiburg saw the Bavarians slip back down to 17th in the table.
Nils Petersen's late double ensured Werder Bremen collected a deserved three points witha 2-0 win over Hannover at the Weserstadion.
The visitors struggled defensively and were cut open time after time by the hosts, who spurned plenty of chances before the striker - on loan from Bayern Munich - finally found his shooting boots with goals in the 85th and 88th minutes.
Neither side entered the contest in particularly good form, with Hannover's win over Wolfsburg last week halting a slide of four successive defeats while Bremen had not won in four.