Chris Coleman hailed his Wales side after their 1-0 win over Georgia gave them hope of reaching the World Cup in Russia next year.
Tom Lawrence's goal on 49 minutes secured the win to see the Dragons move on to 17 points in Group D behind leaders Serbia on 18 points, with one match to play.
The Republic of Ireland are in third with 16 points.
Speaking after the match at the Boris Paichadze Dinamo Arena in Tbilisi, Coleman told Sky Sports: "It was a tough surface, very slippery, very wet, and we found it difficult at times handling the ball.
"We got in great situations we didn't capitalise on, but overall the commitment and desire was incredible.
He added: "It's always tough to come here, but it's all about the points and about the win. Apart from a couple chances, they had a lot of possession, but our guys stuck to the gameplan and some of the performances out there were heroic.
"One more to go, and all we can do is our work, and we're doing that. It's another clean sheet. All we can do is take care of our business.
"It's a huge test, as big a test as it gets against Ireland, all we can do is do our homework, get onto the pitch with our game plan.
"It's fantastic; all the way through I always felt it would go to the wire in the last game, whether for automatic or a play-off spot. Here we are, it's what we've always wanted and we'll enjoy it. We'll enjoy it even more if we make it."
Wales can win the group if they beat the Republic of Ireland on Monday and Serbia fail to beat Georgia or secure play-off qualification if they avoid defeat.