Peyton Stearns defeated Katie Boulter 6–4, 6–2 at the Miami Masters 1000 on hard court in the first round on 19 March 2025. Stearns, the pre-match favourite at odds of 1.87, converted her status into a convincing victory, breaking serve consistently to control both sets. Boulter, despite entering as a slight underdog at 2.02, struggled to maintain competitive intensity as Stearns' aggressive baseline play dictated rallies throughout. The American's superiority in the opening set proved decisive, and she accelerated through the second to secure a straightforward progression. Stearns' commanding performance underscores her current form heading into the tournament's deeper rounds.