Arouca's recent wins conceal a more contested match than the results suggest. Their wide service remains productive, but Nacional bring back the compact unit and quick outlets used against Braga. The central contest is whether home possession creates a clean receiver before the visitors can escape.
Djouahra supplying Barbero is Arouca's clearest connection, with Fukui offering a later arrival around the box. Nacional can crowd that first reception through their defensive line and Labidi's screening, then look for Song to connect with Baeza. That outlet produced the Braga winner and gives their defending a purpose beyond clearing the ball.
Nacional's five reported injuries restrict depth, but none of those players appeared in the Braga starting team or recorded substitutions. Arouca lose Rukavina's bench creativity while retaining Barbero, who already started the last match. Henriques has explicitly supported using a defensive five when useful, making continuity a reasonable expectation for his debut.
I expect Arouca to take the initiative and Nacional to seek shorter, quicker attacking passages behind the advancing fullbacks. The context of Arouca's recent opposition dismissal and missed opposition penalty matters more than the winning sequence alone. That's why I'm siding with Nacional to come away unbeaten.