Dortmund's Polish striker Robert Lewandowski and Leverkusen's midfielder Gonzalo Castro vie for the ball during the German first division Bundesliga football match Borussia Dortmund vs Bayer Leverkusen in the western German city of Dortmund on December 7, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS: 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 THE DFL DIRECTLY AT + 49 69 650050.