Liverpool's exit from the Champions League was hastened by a VAR intervention. BBC Sport analyses the key refereeing decisions in their season. It could have been very different for Arne Slot's Liverpool against Paris St-Germain on Tuesday night. Trailing 2-0 from the first leg, the Reds were given a 64th-minute spot-kick which might have transformed the tie. Then the video assistant referee... [5111 chars]