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GELSENKIRCHEN, GERMANY - MARCH 17: Schalke players celebrate their 1-0 victory in the Bundesliga match between FC Schalke 04 and VfB Stuttgart at the Veltins Arena on March 17, 2007 in Gelsenkirchen, Germany. (Photo by Christof Koepsel/Bongarts/Getty Images)

GELSENKIRCHEN, GERMANY - MARCH 17:  Schalke players celebrate their 1-0 victory in the Bundesliga match between FC Schalke 04 and VfB Stuttgart at the Veltins Arena on March 17, 2007 in Gelsenkirchen, Germany. (Photo by Christof Koepsel/Bongarts/Getty Images)

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GELSENKIRCHEN, GERMANY - MARCH 17: Mesut Oezil, Kevin Kuranyi, Gerald Asamoah and Christian Pander of Schalke celebrate the 1-0 victory of the Bundesliga match between FC Schalke 04 and VfB Stuttgart at the Veltins Arena on March 17, 2007 in Gelsenkirchen, Germany. (Photo by Christof Koepsel/Bongarts/Getty Images)

GELSENKIRCHEN, GERMANY - MARCH 17: Mesut Oezil, Kevin Kuranyi, Gerald Asamoah and Christian Pander of Schalke celebrate the 1-0 victory of the Bundesliga match between FC Schalke 04 and VfB Stuttgart at the Veltins Arena on March 17, 2007 in Gelsenkirchen, Germany. (Photo by Christof Koepsel/Bongarts/Getty Images)

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GELSENKIRCHEN, GERMANY - DECEMBER 18: Raul Gonzalez of Schalke celebrates after scoring his teams third goal during the Bundesliga match between FC Schalke 04 and 1. FC Koeln at Veltins Arena on December 18, 2010 in Gelsenkirchen, Germany. (Photo by Lars Baron/Bongarts/Getty Images)

GELSENKIRCHEN, GERMANY - DECEMBER 18: Raul Gonzalez of Schalke celebrates after scoring his teams third goal during the Bundesliga match between FC Schalke 04 and 1. FC Koeln at Veltins Arena on December 18, 2010 in Gelsenkirchen, Germany.  (Photo by Lars Baron/Bongarts/Getty Images)

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GELSENKIRCHEN, GERMANY - MARCH 09: Jefferson Farfan (#17) of Schalke celebrates after he scores his team's 3rd goal during the UEFA Champions League round of 16 second leg match between Schalke 04 and Valencia at Veltins Arena on March 9, 2011 in Gelsenkirchen, Germany. (Photo by Martin Rose/Bongarts/Getty Images)

GELSENKIRCHEN, GERMANY - MARCH 09:  Jefferson Farfan (#17) of Schalke celebrates after he scores his team's 3rd goal during the UEFA Champions League round of 16 second leg match between Schalke 04 and Valencia at Veltins Arena on March 9, 2011 in Gelsenkirchen, Germany.  (Photo by Martin Rose/Bongarts/Getty Images)

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GELSENKIRCHEN, GERMANY - NOVEMBER 09: Kevin-Prince Boateng of Schalke celebrates after scoring his team's 2nd goal during the Bundesliga match between FC Schalke 04 and Werder Bremen at Veltins-Arena on November 9, 2013 in Gelsenkirchen, Germany. (Photo by Sascha Steinbach/Bongarts/Getty Images)

GELSENKIRCHEN, GERMANY - NOVEMBER 09:  Kevin-Prince Boateng of Schalke celebrates after scoring his team's 2nd goal during the Bundesliga match between FC Schalke 04 and Werder Bremen at Veltins-Arena on November 9, 2013 in Gelsenkirchen, Germany.  (Photo by Sascha Steinbach/Bongarts/Getty Images)