After a competitive first half ended goalless, Juventus produced a clinical second-half display, with Tatiana Pinto, Emma Stølen Godø and Alba Redondo finding the net to seal an important away victory.
Häcken created several opportunities during the opening period, while Juventus also threatened through Alba Redondo, Emma Stølen Godø and Amaiur Sarriegi.
The hosts continued to apply pressure after the interval, but Juventus eventually broke the deadlock in the 57th minute.
Sarriegi produced an excellent run before setting up Pinto, who finished to give Juventus the lead. The goal was a landmark moment as it became Juventus Women’s 100th goal in UEFA Women’s Champions League history.
Juventus almost doubled their advantage in the 65th minute when Estela Carbonell’s cross struck the post.
The second goal arrived in the 76th minute. Eva Schatzer delivered a precise cross from a free-kick, and Stølen Godø met it with a looping header to make it 2-0. The goal was confirmed following a lengthy VAR review.
Redondo then completed the scoring two minutes from the end of normal time. The Spanish forward found herself one-on-one with goalkeeper Jennifer Falk and calmly finished to make it 3-0.
Häcken continued to search for a consolation goal in stoppage time, but goalkeeper Pauline De Jong denied Anna Anvegård before another Anvegård effort struck the crossbar.
Goals
• Häcken: No goals.
• Juventus: Tatiana Pinto 57', Emma Stølen Godø 76', Alba Redondo 88'.
The victory moves Juventus onto three points after their opening 2-1 home defeat to Benfica. Häcken, meanwhile, remain without a point after losing their opening two league-phase matches.
Pinto was also celebrating a personal milestone, having now scored four goals in her last four Women's Champions League appearances, including qualifying matches.
Juventus will return to Champions League action on 29 October when they travel to Austria Wien.