Supporters in Germany want video assistant referee (VAR) testing in the Bundesliga to be axed after the system's chief was replaced amid accusations of match-fixing.
Germany and Italy are trialling the VAR this season as FIFA assess whether it will be used at the 2018 World Cup in Russia.
But the system has caused outrage in Germany and the Cologne centre — where all scenes are reviewed by assistant officials — is being blamed for unfair rulings
Supporters in Germany want video assistant referee (VAR) testing in the Bundesliga to be axed
Bundesliga ref Marco Fritz checks the VAR system during Borussia Dortmund tie this month
And according to The42, fans even protested against the system at the weekend, displaying banners at top-flight grounds in a bid to have VAR scrapped immediately.
And on Monday Kicker — the popular Germany magazine — criticised the system with the front-page headline 'Only Losers: Irritation, sanctions, wrong decisions'.
This came after the system drew criticism on Sunday and Hellmut Krug, the head of the VAR system in Cologne, ultimately lost his job a day later.
Bild claimed Krug — a retired German referee — twice influenced penalty decisions in favour of Schalke, who he supports, during their 1-1 league draw with Wolfsburg last month.
Krug denied the accusations, but the German Football Association