Robert Lewandowski scored a hat-trick to leave him on 31 Bundesliga goals this season and seal Bayern Munich's 4-2 comeback home win over Borussia Dortmund on Saturday in Germany's 'Klassiker'. Dortmund raced into a 2-0 lead as Erling Braut Haaland netted twice in the first nine minutes behind closed doors at the Allianz Arena. However Lewandowksi then struck twice, the second from the penalty spot, to haul Bayern level before the break. Leon Goretzka put Bayern ahead for the first time with two minutes left before Lewandowski completed his hat-trick on 90 minutes. "The quality is certainly there, that's our DNA," said Thomas Mueller of Bayern's fightback. The win leaves Bayern two points clear of RB Leipzig at the top of the table. "We shook ourselves up at 2-0 down and deserved to win because we were the dominant team for (the last) 60 minutes," said Bayern coach Hansi Flick.

 Bayern have won the last five meetings between the clubs.- 'Not good enough' - "We weren't good enough. We started well, but didn't play good enough football. We should have been more brave," said Dortmund midfielder Emre Can. The match delivered on its billing as the battle of the Bundesliga's star strikers. Haaland scored with just two minutes gone when his shot clipped the heel of Jerome Boateng. Bayern were reeling after nine minutes when Thorgan Hazard flicked the ball back inside for Haaland to again smash the ball home. Dortmund could have been 3-0 up on 25 minutes but Thomas Meunier squandered the chance to shoot. A minute later, Bayern pulled a goal back when Leroy Sane squared the ball for Lewandowski to score. Bayern went into the break level when Mahmoud Dahoud brought down Kingsley Coman in the area and Lewandowski converted the penalty. After a frantic first-half, the tempo dropped in the second as both teams suffered key injuries. "We started great and ended very badly," admitted Dortmund coach Edin Terzic. Haaland came off after an hour gone with a cut on the back of his ankle. With ten minutes left, Boateng had to be helped off in clear discomfort after twisting his knee. Dortmund were left fuming for what captain Marco Reus claimed was a clear foul on Can late on.