Borussia Dortmund came from 3-0 down to snatch a 3-3 draw with Schalke 04 in a frantic Ruhr derby, while a second-half double from Luca Toni helped Bayern Munich to a more leisurely 3-0 win at Cologne.

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Peru forward Jefferson Farfan put Schalke ahead with a penalty and further goals from defenders Rafinha and Heiko Westermann sent the visitors clear.

It may have looked comfortable but Dortmund clawed two goals back and Schalke had both Christian Pander and Fabian Ernst sent off before Alex Frei's penalty earned Dortmund a point.

On a day of memorable fightbacks, Hamburg SV took advantage of Schalke's collapse to replace them at the top with a 3-2 win at home to Bayer Leverkusen, who had been leading 2-0.

With four matches played, Hamburg lead with 10 points, followed by Bayern on eight.