Dortmund's Polish striker Robert Lewandowski reacts during the German first division Bundesliga football match Borussia Dortmund vs FSV Mainz in Dortmund, western Germany, on April 20, 2013. 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.