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Borussia Dortmund ´s CEO Hans-Guenther Watzke (L) and new coach Thomas Tuchel attend a press conference of first division Bundesliga football club Borussia Dortmund in the Signal Iduna Park stadium in Dortmund, western Germany on June 3, 2015. AFP PHOTO / PATRIK STOLLARZ (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images)

Borussia Dortmund ´s CEO Hans-Guenther Watzke (L) and new coach Thomas Tuchel attend a press conference of first division Bundesliga football club Borussia Dortmund in the Signal Iduna Park stadium in Dortmund, western Germany on June 3, 2015. AFP PHOTO / PATRIK STOLLARZ        (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images)