Bayern held at Hamburg to open door for Dortmund
Borussia Dortmund have a chance to revive a dormant title race with a win at home to bottom club Heidenheim on Sunday, which would draw them to within six points.
Hamburg had lost 17 and drawn three of their past 20 games with Bayern but put up a fight, taking the lead with a Fabio Vieira penalty after 32 minutes.
The defending champions hit back when Harry Kane and Luis Diaz scored either side of half-time, but the hosts swiftly equalised through Luka Vuskovic.
Hamburg had a chance to win it late with Manuel Neuer well outside his box...