DORTMUND, GERMANY - APRIL 25: (EXCLUSIVE COVERAGE) (EDITORS NOTE: Parts of this image have been obscured in accordance with Germany's privacy laws.) Marcel Schmelzer of Borussia Dortmund renews contract until 2021 for Borussia Dortmund on April 25, 2016 in Dortmund, Germany. (Photo by Alexandre Simoes/Borussia Dortmund/Getty Images)