Coco Gauff Is a Grand Slam Champion in Singles and Doubles, Exceeding Her Own Expectations

Coco Gauff of the United States (L) and Katerina Siniakova of the Czech Republic pose with the trophy as they won the women's doubles final match of the French Open tennis tournament in Paris on June 9, 2024. Jean-Francois Badias/AP Photo

PARIS—Coco Gauff is a Grand Slam champion in singles and doubles, something she did not expect to happen so soon.

The 20-year-old American won her first major doubles title on Sunday by teaming with Katerina Siniakova for the French Open trophy. They defeated Italians Jasmine Paolini and Sara Errani 7–6 (5), 6–3, giving Gauff her second major after winning the U.S. Open singles last year.