Anhelina Kalinina defeated Aryna Sabalenka 6–4, 1–6, 6–1 in the second round of the Miami Masters on hard court, pulling off a significant upset against the pre-match favourite. Sabalenka, seeded and heavily favoured at 1.11 odds, began competitively but collapsed after the opening set, winning just seven games across the final two sets as Kalinina, at 8.32 odds, dominated the latter stages. The Ukrainian's ability to recover from a second-set loss and impose control in the decider proved decisive. This result represents a notable scalp for Kalinina in the Masters 1000 draw and underscores the unpredictability of early-round matches even against top-seeded opponents.