SportsRuhr Derby - It's WarTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoSports11/22/2017November 22, 2017Fans in the Ruhr valley, 'the beating heart of German football', are getting ready for the 'greatest match of all' - Dortmund versus Schalke. It's war.https://p.dw.com/p/2o5UvAdvertisement