Coco Gauff defeated Rebecca Marino 6–4, 6–3 in the first round of the Miami Masters 1000 on hard court on 23 March 2023, as the heavy favourite with odds of 1.17. Gauff controlled the match from the outset, breaking Marino's serve at crucial moments to secure both sets with relative comfort. The American's superior court positioning and aggressive baseline game proved too much for Marino, who struggled to find rhythm against Gauff's consistent ball-striking. The result kept Gauff on track in Miami as she advanced to the second round, reinforcing her status as a top-tier contender at the tournament.