Bilbao, Europa League and Copa del Rey finalists last season, have made a dreadful start to the latest campaign and Sunday's victory leaves them in 14th on 11 points from 10 matches.
Aduriz opened the scoring from the penalty spot in the 12th minute in rain-lashed Granada and doubled the visitors' lead 15 minutes later with a low drive from just outside the area.
Youssef El Arabi pulled a goal back for Granada eight minutes after the break but they could not make some sustained pressure count and are second from bottom on eight points.
Espanyol have also made a poor start but managed a second win of the season by beating Real Sociedad 1-0 away with Diego Colotto scoring in the 77th minute.
Deportivo Coruna won 1-0 at home to Real Mallorca thanks to a Bruno Gama effort after 30 minutes and Osasuna stayed rooted to the bottom on five points when they had a player sent off and lost 1-0 at home to Real Valladolid.
German Patrick Ebert netted for Valladolid seven minutes from time after Osasuna had Ruben dismissed for a second yellow card in the 76th.
Bilbao v Granada match data
Athletic Bilbao gained a win even though Granada CF managed to take more shots on goal during the course of play. Granada CF fired in 24 shots — nine on target — compared to Los Rojiblancos's shots on goal total of 8.
Granada CF had 50.1% of the possession during the loss. Floro Flores made the biggest impact of any substitute after coming on for Pape Malickou Diakhaté in the 72nd minute, as he took three shots. Yacine Brahimi had five shots for Granada CF, more than any of his team-mates. Guillherme Siqueira's 14 passes to Dani Benítez were the most of any Granada CF teammates during the match.
Granada CF and Athletic Bilbao evenly split the possession during the first half, but Athletic Bilbao took a 2-0 lead into the dressing room. Granada CF attempted six shots in the first half, while Los Leones took six.
- Sports & Recreation
- Athletic Bilbao
- Granada CF