It leaves Michael O’Neill’s men sitting fifth in Group H after winning two of their eight qualifying fixtures to date – both of which came against San Marino, including Saturday’s 3-0 triumph in Belfast.
The Green and White Army turned out in their numbers once again to get behind Northern Ireland. Here are the best fan photos from the stadium.
1. Young Northern Ireland fan
It's fair to say Northern Ireland fans weren't impressed with the referee's performance - including this young fan! Photo: Phil Magowan / Press Eye
2. Come on Northern Ireland!
A young Northern Ireland fan cheers on the team against Slovenia at Windsor Park Photo: Phil Magowan / Press Eye
3. Watching on
Northern Ireland fans watch on as their team face Slovenia Photo: Phil Magowan / Press Eye
4. Northern Ireland fans
Northern Ireland fans in the stadium ahead of the match Photo: Phil Magowan / Press Eye