Portugal now sit alone atop Group A2 of the National League after cruising to a 2-0 victory over the Czech Republic on Thursday night.
The two sides entered the contest level on points following the opening two rounds of action, but Fernando Santos' men showed all of their strength in what was a comfortable victory for the home side.
Although the Czechs defended well early on, and even threatened Diogo Costa's goal thanks to a Jan Kuchta effort, Portugal eventually turned their 62 percent first half possession into goals.
A fine Bernardo Silva pass picked out Joao Cancelo, who made no mistake to open the scoring, while Goncalo Guedes added a second soon after.
Portugal continued to threaten in the second half, with the Manchester United duo of Cristiano Ronaldo and Bruno Fernandes asserting their influence.
In the end, their efforts didn't turn into goals, though Portugal did see out the final minutes with relative ease, much to the delight of the Lisbon crowd.
The result means Portugal top the standings on seven points, while Spain are onto five and the Czech Republic remain on four after three matches.
Portugal are making a habit of doing well in this tournament, as the Seleção have once again made a great start to life in Group 2, taking seven points from a possible nine available. Fernando Santos' side now sit two points clear of Spain in second place, and are in pole position once again to make the finals stage.
After thrashing Switzerland 4-0 last time out - who Portugal will meet once again on Sunday in Geneva - it was more of the same this evening against a Czech Republic side that were sub-par at best.
However, you have to beat what is in front of you. After a somewhat fortunate draw against Spain in Seville in their Nations League opener, Portugal have found their feet again, and look a very dangerous outfit at this point.