Ireland defeated Austria 1-0 in Vienna thanks to a great goal by Derry-born star James McClean.
The win puts Ireland on top of their World Cup group and leaves them in prime qualifying position.
Austria had dominated the first half and Ireland only had 34 percent of the possession. The second half was dramatically different as Ireland took the game to their hosts and ran out surprising winners. McClean’s goal was from an acute angle and was one of the most important of his career.
Manager Martin O’Neill was delighted with the victory "Austria will naturally be disappointed because they have dropped all three points here, they drew at home with Wales and were beaten by Serbia.
"Something tells me that they still have a chance and while I believe - and have always believed - this group will be tight, I think teams will still take points from each other.
"I'm really pleased to have 10 points on the board from four matches. But there are a million miles to go."
Austria manager Marcel Koller: "It is very difficult for us and they are big points for Ireland, who are well ahead of us now and will take a lot of self-confidence into the winter break.
"But there are still six games and 18 points to play for. I know it will be difficult, but we will do everything we can to be successful.
"We knew Ireland played a very defensive game and, after going in front, they became even more defensive. But if you do not score, then you do not win the game.