Carlos Alcaraz defeated Joao Fonseca 6–4, 6–4 in the first round of the Miami Masters on hard court, confirming his status as the heavy pre-match favourite with odds of 1.14 to Fonseca's 5.59. The Spanish world number one controlled both sets with consistent tennis, breaking serve at crucial moments to secure a straightforward victory. Fonseca, despite the competitive odds suggesting a significant underdog role, offered resistance in each set but could not sustain the pressure required to trouble Alcaraz. The result maintains Alcaraz's strong early-season form on the ATP circuit ahead of the tournament's later stages.