On August 18, 2020, having been unable to play for Orlando, Sonnett joined Swedish Damallsvenskan club Kopparbergs/Göteborg FC on a short-term contract until November 2020.[46] Orlando retained Sonnett's NWSL rights. Five days later she made her Damallsvenskan debut, starting in a 3–0 defeat to Rosengård.[47] She made 10 league appearances as Göteborg won its first Damallsvenskan title.[48][49]