2019 Miami Open – Men's Singles

John Isner was the defending champion but lost to Roger Federer in the final, 1–6, 4–6. It was Federer's 4th Miami title and 28th Masters 1000 title. Félix Auger-Aliassime became the youngest men's singles semifinalist in the tournament's 35-year history and the first teenage semifinalist since Andy Murray and Novak Djokovic in 2007. Auger-Aliassime also became the first player born in the current millennium (in or after year 2000) to reach the semifinals at any ATP Tour Masters 1000 event.

2019 Miami Open – Men's Singles

John Isner was the defending champion but lost to Roger Federer in the final, 1–6, 4–6. It was Federer's 4th Miami title and 28th Masters 1000 title. Félix Auger-Aliassime became the youngest men's singles semifinalist in the tournament's 35-year history and the first teenage semifinalist since Andy Murray and Novak Djokovic in 2007. Auger-Aliassime also became the first player born in the current millennium (in or after year 2000) to reach the semifinals at any ATP Tour Masters 1000 event.