Coco Gauff wins the US Open for her first Grand Slam title at age 19 by defeating Aryna Sabalenka

Coco Gauff, of the United States, holds up the championship trophy after defeating Aryna Sabalenka, of Belarus, in the women's singles final of the U.S. Open tennis championships, Saturday, Sept. 9, 2023, in New York. (AP Photo/Frank Franklin II)

Coco Gauff is still a teenager, after all, and so it should surprise no one that she was on her phone in the locker room, scrolling through social media, right up until 10 minutes before heading out on court for the U.S. Open final.

What the 19-year-old from Florida was reading, she would say later, were various comments, negative ones, “saying I wasn’t going to win today; that just put the fire in me.”

As a pro athlete from a young age, as someone of whom greatness has been expected by some and doubted by others, Gauff has always taken it all in and kept moving forward, trying to learn from each setback. And now, at a tournament she used to visit as a kid to see her idols, Serena and Venus Williams, Gauff is a Grand Slam champion herself and a certified star.