The 56th-ranked Siniakova, who had injury problems of her own, took advantage of Wozniacki’s inconsistent serving to win 6-3, 6-4 for her second career title.
Both players took medical timeouts following the first set as Wozniacki had problems with her left wrist and Siniakova with her right arm.
Siniakova was playing in the Swedish Open final for the second year in a row after losing last year to German Laura Siegemund.
