Rebecca Marino defeated Yulia Putintseva 7–6, 6–2 at the Miami Masters 1000 on hard court in the first round, an upset over the pre-match favourite Putintseva. Marino, seeded as the underdog at 2.55 odds, controlled the second set decisively after a competitive opening set that went to a tiebreak. The Canadian's performance in the opener, where she secured the breaker, proved decisive in shifting momentum through the match. The victory represents a notable scalp for Marino against a higher-ranked opponent in one of the tour's premier events.