Marta Kostyuk defeated Caty McNally 6–2, 6–3 in the Madrid Masters 1000 round of 16 on clay on 27 April 2026, confirming her status as the heavy pre-match favourite at odds of 1.16 to McNally's 4.99. The Ukrainian's dominant performance saw her advance comfortably against the American, who could not mount sustained resistance on the Madrid surface. Kostyuk's progression to the quarterfinals underscores her growing consistency at elite level and positions her well for a deep run in the tournament.