The opening minutes hinted that this wild and hysteric World Cup might just continue in the same manner.
Huddersfield's Mathias Jorgensen opened the scoring in the first minute, finishing off a scrappy corner before Mario Mandzukic responded with his own ugly goal, taking advantage after a loose ball ping-balled around the Danish defence.
But the game soon settled into a tight and terse affair, neither side blinking until Jorgensen denied a certain goal by taking down Rebic in the dying moments of extra time.
The subsequent penalty was missed, ensuring the match would be settled by a shootout and after a series of saves from both goalkeepers, Croatia eventually came out on top.
Here are five things we learned: