A little more than a month ago, the idea that Coco Gauff and Jessica Pegula might enter the U.S. Open as the two hottest players in tennis would have seemed preposterous.
Gauff had endured a disappointing and disheartening spring and early summer. There was yet another one-sided loss to Iga Swiatek, the world No. 1, at the French Open, and then a first-round exit from Wimbledon.
Pegula had run into her quarterfinal wall once more at Wimbledon, despite having a break point for a 5-1 lead in the third set against Marketa Vondrousova, the eventual champion. And as a doubles team, Gauff and Pegula had lost the French Open final and fell in the fourth round at Wimbledon.