Alexander Bublik defeated Sebastian Baez 6–3, 6–4 at the Miami Masters, an ATP Masters 1000 event on hard court in the first round on 19 March 2025. Bublik, the pre-match favourite at 1.53 odds, delivered a composed performance to secure a straight-sets victory against Baez, who entered at 2.6. The Kazakh player's clinical execution across both sets saw him break serve on multiple occasions and maintain control throughout, never allowing his Argentine opponent to build sustained pressure. Baez, ranked outside the top 100, showed glimpses of competitiveness but could not muster the consistency required to trouble Bublik's baseline game on the fast hard court. The result keeps Bublik's Miami campaign on track as he advances to the next round.