Sara Errani defeated Caroline Wozniacki 3–6, 7–5, 7–5 in the first round of the Madrid Masters 1000 on clay on 24 April 2024, pulling off a notable upset against the pre-match favourite. Wozniacki, backed at 1.36 odds, dominated the opening set but could not maintain her advantage as Errani, priced at 3.39, fought back to claim two consecutive sets in competitive fashion. The Italian's comeback from a set down demonstrated her resilience on the surface where she has traditionally performed well. The result represents a significant scalp for Errani and suggests potential momentum as the clay-court season progresses.