LEVERKUSEN, GERMANY - APRIL 30: Sky expert Lothar Matthaeus and Christoph Metzelder are seen prior to the Bundesliga match between Bayer Leverkusen and Hertha BSC Berlin at BayArena on April 30, 2016 in Leverkusen, Germany. The match between Leverkusen and Berlin ended 2-1. (Photo by Christof Koepsel/Bongarts/Getty Images)
COLOGNE, GERMANY - MAY 17: Christoph Metzelder poses during the pre golf party of the 7th Golf Charity Cup hosted by the Christoph Metzelder Foundation on May 17, 2015 in Cologne, Germany. (Photo by Mathis Wienand/Getty Images)
FRANKFURT AM MAIN, GERMANY - SEPTEMBER 28: Former player Christoph Metzelder smiles prior to the Bundesliga match between Eintracht Frankfurt and Hamburger SV at Commerzbank Arena on September 28, 2013 in Frankfurt am Main, Germany. (Photo by Thorsten Wagner/Bongarts/Getty Images)
GELSENKIRCHEN, GERMANY - APRIL 25: Christoph Metzelder looks on during a FC Schalke 04 press conference ahead of the UEFA Champions League semifinal first leg match against Manchester United at Veltins Arena on April 25, 2011 in Gelsenkirchen, Germany. (Photo by Lars Baron/Bongarts/Getty Images)
HANOVER, GERMANY - NOVEMBER 15: Real Madrid football player Christoph Metzelder (C) fights with tears during Robert Enke's memorial service prior to Enke's funeral at AWD Arena on November 15, 2009 in Hanover, Germany. Tens of thousands of fans paid their last tribute to Enke, who was also goalie for the German national team, following Enke�s suicide on November 10. (Photo by Vladimir Rys/Bongarts/Getty Images)
