De klassiker: Hansi Flick downcast as Joshua Kimmich injury overshadows Bayern's win at Dortmund

Germany international was withdrawn in some distress in the first half of Bayern's 3-2 victory

Bayern Munich's Joshua Kimmich challenges Borussia Dortmund attacker Erling Haaland druring Der Klassiker on November 7, 2020. Bayern won the Bundesliga clash 3-2. EPA

Bayern manager Hansi Flick consoles iinjured Bayern midfielder Joshua Kimmich. EPA

Injured Bayern midfielder Joshua Kimmich is helped from thew pitch. EPA

Dortmund players after Bayern Munich's David Alaba scores their first goal. Reuters

Dortmund's German forward Marco Reus and Bayern midfielder Leon Goretzka challenge for a header. AFP

Bayern's David Alaba celebrates after scoring to make it 1-1. EPA

Bayern Munich's Polish forward Robert Lewandowski scores a goal that was disallowed for offside by VAR. AFP

Bayern Munich's Robert Lewandowski celebrates scoring their second goal. Reuters

Dortmund's Julian Brandt under pressure from Leroy Sane of Bayern. EPA

Bayern Munich's German midfielder Leroy Sane shoots past Dortmund Swiss goalkeeper Roman Buerki to make it 3-1. AFP

Dortmund forward Erling Braut Haaland rounds Bayern goalkeeper Manuel Neuer to score his team's second goal. AFP

Dortmund's Erling Haaland scores a consolation goal to make it 3-2. EPA

Dortmund's Marco Reus after missing a chance. EPA

Bayern Munich coach Hansi Flick said it was too early to determine the extent of midfielder Joshua Kimmich's injury that overshadowed Saturday's 3-2 win at Borussia Dortmund.

The Germany international has been pivotal to Bayern's success under Flick but was helped from the pitch in obvious distress after twisting his knee in a first-half challenge at Signal Iduna Park.

"He'll fly home with us and be examined - it's too early to say the extent of the injury," said Flick.

"He's a very important player for us and with his mentality, he isn't someone you can replace like for like."

Kimmich is also a concern for Germany ahead of the friendly against the Czech Republic on Wednesday before Nations League games against Spain and then Ukraine in the following six days.

Bayern earned their fourth straight win over Dortmund as Robert Lewandowski scored his 11th goal in just six league games to move top of the Bundesliga.

After Marco Reus gave Dortmund the lead, David Alaba blasted home a free kick to make it 1-1 at the break before Lewandowski struck with a superb header early in the second half.

Lewandowski, the European player of the year, could have finished with a hat-trick after the VAR ruled out further efforts either side of half-time.

Leroy Sane came off the bench to grab Bayern's third 10 minutes before the final whistle while Erling Haaland scored Dortmund's late second goal.

Norwegian striker Haaland was annoyed at his own performance after converting only one of his four chances.

"I have to score more goals, if we don't put our chances away at this level, then we won't win," said the 20-year-old.

"They are the best team in the world, but we have to work harder to take the next step to be as good as them."