Spain have not always looked as smooth as their European champion label suggests, but they have carried themselves like a side that understands tournament management. De la Fuente's team can slow games down, protect central zones and choose their attacking moments with almost annoying patience.
Austria, meanwhile, bring a different kind of threat. Rangnick's side are intense, vertical and never shy about turning a match into a scrap. That said, knockout football can be cruel when a pressing team gets pulled out of shape against elite passers.
The rhythm should be fascinating. Spain will want long possessions, controlled rest defence and quick pressure after losing the ball. Austria will look for direct breaks, second balls and set-piece situations. It feels like a chess game at first, then maybe a storm after the opening goal.
There is also the mental side. Spain's recent World Cup knockout history is a little uncomfortable, no matter how strong the squad looks on paper. Still, this team has maturity, midfield quality and enough defensive calm to avoid panic if Austria start sharply.
Austria's route to an upset probably depends on keeping the first half tight and forcing Spain to question themselves. Even so, La Roja's control between the lines should gradually wear the underdog down. It may not be fireworks from minute one, but it should lean red.
