Iva Jovic defeated Sofia Costoulas 6–2, 7–6 in the quarter-finals of the WTA 250 Auckland tournament on hard court on 9 January 2026. Jovic, the clear pre-match favourite at odds of 1.27, duly progressed as expected, though Costoulas mounted a competitive second set before losing the tie-break. The opening set proved decisive, with Jovic establishing dominance early and maintaining control throughout. Costoulas' odds of 4.1 reflected her underdog status, yet she demonstrated resilience by forcing a second-set decider, suggesting a composed performance despite the disparity in seeding or ranking. Jovic's progression to the semi-finals reinforces her standing as a contender in Auckland.