World Cup play-offs
The two countries were both unseeded for the draw in Zurich and Northern Ireland were paired with Switzerland while the Republic will face Denmark.
The two-legged ties will take place between 9 and 14 November, with Northern Ireland at home in the opening leg, while the Republic will host Denmark in their return fixture.
🔰Northern Ireland 🆚 Switzerland
🔰Croatia 🆚 Greece
🔰Denmark 🆚 Republic of Ireland
🔰Sweden 🆚 Italy