Both Liverpool and the Merseyside Police have been made aware of the chaos outside Benfica's Estadio da Luz on Tuesday night that left thousands stuck outside the ground.
It's estimated that thousands of supporters in Lisbon were forced to miss part of the Reds' 3-1 win because of the poorly organised system of entry before the Champions League quarter-final first leg.
Several supporters in Portugal have told the ECHO about what they felt was a heavy-handed and "antagonistic" police presence who appeared ready for hostility from match-goers.
