1. FC Koeln v Borussia Moenchengladbach - Bundesliga [Getty Images]

COLOGNE, GERMANY - SEPTEMBER 14: Police presence outside the stadium prior to the Bundesliga match between 1. FC Koeln and Borussia Moenchengladbach at RheinEnergieStadion on September 14, 2019 in Cologne, Germany. (Photo by Jörg Schüler/Bongarts/Getty Images) — see more

COLOGNE, GERMANY - SEPTEMBER 14: Police presence outside the stadium prior to the Bundesliga match between 1. FC Koeln and Borussia Moenchengladbach at RheinEnergieStadion on September 14, 2019 in Cologne, Germany. (Photo by Jörg Schüler/Bongarts/Getty Images)

Bongarts Jörg Schüler