Borussia Dortmund and Schalke 04 have gone in goalless at half time, despite the hosts having the better of the action in the opening 45 minutes.
The game started with both teams playing good football, but the best chance early on fell to Robert Lewandowski. The Polish striker was found by a Marco Reus cross from the left wing but fluffed his lines and his header went well off target.
It became a little scrappy but on 20 minutes Dortmund came close to opening the scoring through Sebastian Kehl, who headed inches wide from a Henrikh Mkhitaryan clipped cross.
The hosts were by now well on top and once more could have gone ahead. Mkhitaryan drilled a low shot from the edge of the box from Erik Durm's pass, but Ralf Fahrmann was down well to tip wide and keep his side level.
