Virgil van Dijk gave Arne Slot a birthday present to remember as Diego Simeone was sent-off after accusing Liverpool's fans of insulting him on a wild Anfield night.
Liverpool had led their opening Champions League game of the season 2-0 but squandered the advantage with Marcos Llorente scoring twice for the Spaniards; van Dijk, however, gave the hosts the win they deserved with a 92nd minute header.
That was only the start of the drama, however, as Simeone was given a straight red card, having become embroiled in a fracas close to Atletico's dugout: stewards and members of the crowd jostled with the Argentine and members of his coaching staff.