
Sofia Kenin of the United States serves during the women's singles final against Garbine Muguruza of Spain at the Australian Open tennis tournament in Melbourne, Australia on Feb. 1, 2020. (Photo by Bai Xue/Xinhua)

Sofia Kenin of the United States serves during the women's singles final against Garbine Muguruza of Spain at the Australian Open tennis tournament in Melbourne, Australia on Feb. 1, 2020. (Photo by Bai Xue/Xinhua)