Klopp agrees with 5 other managers on controversial ‘sin bin’ This Is Anfield
Ange Postecoglou: Spurs boss says possible introduction of blue cards and sin-bins would ‘destroy’ the game bbc.co.uk
‘It’s going to destroy football!’ – Tottenham boss Ange Postecoglou joins Liverpool coach Jurgen Klopp in slamming controversial blue cards trial Goal.com
IFAB delays plans to publish details of blue card and sin-bin trials until March Sky Sports
Blue cards plan in turmoil as Premier League managers join backlash The Telegraph