Forward Harry Kane scored once and helped set up another as champions Bayern Munich battled past Borussia Dortmund 2-1 in the Bundesliga's Klassiker on Saturday to maintain their perfect start to the season with their seventh straight win.

Bayern Munich went back to the top of the Bundesliga on Saturday, defeating Borussia Dortmund 4-2 at home to give Thomas Tuchel a winning start as coach of the Bavarian giants.