Arsenal boss Unai Emery told Germany manager Joachim Low he was banned from entering the Arsenal training center.
Low wanted to meet Gunners star Mesut Ozil in an attempt to cool the simmering between the playmaker and the German FA.
Ozil retired from the German national team after their disappointing attempt to defend the World Cup this summer.
German publication
Bild report that he has recently tried in vain to contact the 29-year-old with regard to his retirement decision and after receiving no response from Ozil, Low jetted to London to meet him .
However, Emery himself gave the order to refuse Low and Bierhoff entry to London Colney.