Borussia Dortmund

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CORRECTS IDENTITY OF FREIBURG'S PLAYER AT LEFT TO PHILIPP ZULECHNER - Freiburg's Philipp Zulechner, left, challenges for the ball with Dortmund's Kevin Großkreutz during the German first division Bundesliga soccer match between SC Freiburg and Borussia Dortmund in Freiburg, Germany, Sunday March 9, 2014. (AP Photo/dpa, Patrick Seeger)

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Dortmund's Pierre-Emerick Aubameyang, right, challenges for the ball with Freiburg's goalkeeper Oliver Baumann , left, during the German Bundesliga soccer match between SC Freiburg and Borussia Dortmund in Freiburg, Germany, Sunday March 9, 2014. (AP Photo/dpa,Patrick Seeger)

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From left: Dortmund's Kevin Großkreutz, Mats Hummels, Marcel Schmelzer, Lukasz Piszczek, Sebastian Kehl, Nuri Sahin und Pierre-Emerick Aubameyang celebrate the opening goal by Sebastian Kehl during the German first division Bundesliga soccer match between SC Freiburg and Borussia Dortmund in Freiburg, southern Germany, Sunday March 9, 2014. (AP Photo/dpa,Patrick Seeger)

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Zenit's Axel Witsel, left, and Luis Neto, right, go for a header over Borussia's Robert Lewandowski during the Champions League soccer match between Zenit St.Petersburg and Borussia Dortmund at Petrovsky stadium in St.Petersburg, Russia, on Tuesday, Feb. 25, 2014. (AP Photo/Dmitry Lovetsky)

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Zenit goalkeeper Yuri Lodygin, center, reacts after missing Borussia's second goal during the Champions League soccer match between Zenit St.Petersburg and Borussia Dortmund at Petrovsky stadium in St.Petersburg, Russia, on Tuesday, Feb. 25, 2014. (AP Photo/Dmitry Lovetsky)

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Zenit's Axel Witsel, right, is blocked by Borussia's Henrikh Mkhitaryan, center, and Nuri Sahin, left, during the Champions League soccer match between Zenit St.Petersburg and Borussia Dortmund at Petrovsky stadium in St.Petersburg, Russia, on Tuesday, Feb. 25, 2014. (AP Photo/Dmitry Lovetsky)

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Borussia's Marco Reus blocks Zenit's Axel Witsel, right, from making a kick during the Champions League soccer match between Zenit St.Petersburg and Borussia Dortmund at Petrovsky stadium in St.Petersburg, Russia, on Tuesday, Feb. 25, 2014. (AP Photo/Dmitry Lovetsky)

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Zenit's Andrey Arshavin, right, watches as Borussia's Henrikh Mkhitaryan, center right, and other team players celebrate their goal against Zenit during the Champions League soccer match between Zenit St.Petersburg and Borussia Dortmund at Petrovsky stadium in St.Petersburg, Russia, on Tuesday, Feb. 25, 2014. (AP Photo/Dmitry Lovetsky)

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Zenit's Axel Witsel, center, is blocked by Borussia's Nuri Sahin, left, and Sebastian Kehl during the Champions League soccer match between Zenit St.Petersburg and Borussia Dortmund at Petrovsky stadium in St.Petersburg, Russia, on Tuesday, Feb. 25, 2014. (AP Photo/Dmitry Lovetsky)