La Roja’s dominance paid off in the 36th minute as the Real Sociedad forward converted Marc Cucurella’s pass with a precise finish.
Spain controlled the first half against a disciplined Austrian side, enjoying over 64% possession and setting the tempo throughout.
Despite falling behind, Ralf Rangnick’s men stayed organized defensively and limited the damage to just one goal.
Goalkeeper Alexander Schlager produced several crucial saves to keep Austria in the contest, while David Alaba and his teammates struggled to create meaningful attacking opportunities.
With only one goal separating the sides, the Round of 16 clash remains wide open.
Spain will aim to build on its advantage, while Austria must take more risks after the break in search of an equalizer.
An intense and tactical second half awaits as both European nations battle for a place in the quarterfinals.