Former Peterborough United striker Conor Washington scored the only goal on his home debut for Northern Ireland.
Their 1-0 win over Slovenia in Belfast means Michael O’Neil’s side have made it a record ten games unbeaten.
Washington says appearing at Windsor Park was special.
Northampton Town have extended their unbeaten League Two run to 17 games.
They came from 2-0 down to draw 2-2 at 10-man Mansfield.
The Cobblers remain 13 points clear at the top of the table after Oxford’s draw against Cambridge.
In the National League North, Corby lost 4-1 at Solihull Moors.
Brackley’s game at home to Telford was postponed due to a waterlogged pitch – as was Kettering’s match at home to Bedworth and Rushden & Diamonds’ game at Arlesey.