So often the bringer of great dread for Irish football fans, Ireland had the ball in the Danish net after only 5 minutes tonight.
Even for Ireland, this was a very, very early goal.
The hero of this World Cup qualifying campaign, it was Shane Duffy who reacted quickest to a deflected cross and headed Ireland 1-0 ahead.
With the Aviva still reeling after an incredible rendition of Amhrán na bhFiann, Irish fans could hardly believe they were ahead after so short a time.
After Robbie Brady hit a rasping free-kick into the box, a careless attempt at a clearance from a Danish defender put the ball directly into Duffy's path.
With so long remaining in this crucial World Cup play-off, Ireland will need their wits about them as they attempt to build upon what they have earned so early.
Here is the goal that gave Ireland their opening goal in this play-off campaign.
— RTÉ Soccer (@RTEsoccer) November 14, 2017