Cathrin Gilbert, Maik Großekathöfer, Jörg Kramer, Gerhard Pfeil and Michael Wulzinger write for the sports pages of Spiegel. Udo Ludwig, an expert in doping, who is widely regarded as one of Germany's best investigative journalists, works for the weekly's German news pages. Jens Weinreich is a former sports editor of Berliner Zeitung. He has worked as a freelance journalist since 2008.