Denmark thrashed the Republic of Ireland 5-1 on Tuesday night to qualify for the 2018 World Cup.
Shane Duffy had given Martin O'Neill's side a sixth-minute lead, but Andreas Christensen's scuffed effort brought Denmark level on the half-hour mark.
Eriksen stamped his authority on the second leg just three minutes later to put the visitors into a commanding lead.
On a Danish counter-attack, Nicolai Jorgensen laid the ball off to 25-year-old Eriksen just outside the penalty area, who unleashed his unstoppable drive first time in off the crossbar.
Christian Eriksen's 1st goal of the night is a worldie November 15, 2017
The Republic couldn't find a response, as Eriksen scored a further two to complete an emphatic hat-trick.
Just to rub salt into the wounds, Nicklas Bendtner netted the Danes' fifth in added time from the penalty spot.
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