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Dortmund's striker Marco Reus (L) and Cologne's Polish defender Pawel Olkowski vie for the ball during the German First division Bundesliga football match 1 FC Koeln vs Borussia Dortmund on October 18, 2014 in Cologne, western Germany. AFP PHOTO / PATRIK STOLLARZ DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. IMAGE SEQUENCES TO SIMULATE VIDEO IS NOT ALLOWED AT ANY TIME. FOR FURTHER QUERIES PLEASE CONTACT DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images)

Dortmund's striker Marco Reus (L) and Cologne's Polish defender Pawel Olkowski vie for the ball during the German First division Bundesliga football match 1 FC Koeln vs Borussia Dortmund on October 18, 2014 in Cologne, western Germany. AFP PHOTO / PATRIK STOLLARZ

DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. IMAGE SEQUENCES TO SIMULATE VIDEO IS NOT ALLOWED AT ANY TIME. FOR FURTHER QUERIES PLEASE CONTACT DFL DIRECTLY AT + 49 69 650050.        (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images)