Coco Gauff of the U.S. reacts as she plays against France's Lois Boisson during their semifinal match of the French Tennis Open at the Roland-Garros stadium in Paris, Thursday, June 5, 2025.

Coco Gauff, who drew the No. 2 seed for the women's singles field, was set to take on Lois Boisson. If you hadn't heard of her opponent before this tournament, you aren't alone.

Coco Gauff of the U.S. reacts as she plays against France's Lois Boisson during their semifinal match of the French Tennis Open at the Roland-Garros stadium in Paris, Thursday, June 5, 2025.

World No 361 Lois Boisson is arguably the most unheralded player ever to reach a major semi-final, and while she played respectably enough, she was a little out of her depth.

Coco Gauff of the U.S. celebrates as she won the semifinal match of the French Tennis Open against France's Lois Boisson at the Roland-Garros stadium in Paris, Thursday, June 5, 2025.

Winner Coco Gauff of the U.S., left, and France's Lois Boisson shake hands after their semifinal match of the French Tennis Open at the Roland-Garros stadium in Paris, Thursday, June 5, 2025.

Coco Gauff of the U.S. celebrates as she won the semifinal match of the French Tennis Open against France's Lois Boisson at the Roland-Garros stadium in Paris, Thursday, June 5, 2025.

Coco Gauff of the U.S. celebrates as she won the semifinal match of the French Tennis Open against France's Lois Boisson at the Roland-Garros stadium in Paris, Thursday, June 5, 2025.

Coco Gauff of the United States beat France’s Loïs Boisson 6-1, 6-2 in the French Open semifinals. Gauff, the No. 2 seed, will face No. 1 seed Aryna Sabalenka in the finals on Saturday.