Coco Gauff made a dramatic comeback to defeat 15-year-old Russian Mirra Andreeva in a thrilling three-set match at the US Open, setting up a semi-final clash against second seed Elena Rybakina. The fourth-seeded Gauff was taken to the brink in the first set, losing it in just 26 minutes. However, she fought back with resilience, winning 2-6, 7-6 (9-7), 6-2. Her performance was fueled by the inspiration of compatriot Frances Tiafoe, who had earlier staged a comeback win over Alex Michelsen. This victory marks Gauff’s second consecutive Grand Slam semi-final appearance and her first in New York since 2023. For the first time since 1975, the top four seeds in the women's singles draw have reached the semi-finals at the US Open. This historic line-up includes Aryna Sabalenka, Elena Rybakina, Jessica Pegula, and Coco Gauff. It is the first time the top four seeds have reached the women's semi-finals at any Grand Slam since Wimbledon in 2009, highlighting a rare and exciting convergence of top talent. Elena Rybakina, who will become the new world number one on Monday, defeated Zheng Qinwen in a closely contested match, 3-6, 6-1, 6-4. This was Rybakina's first time losing a set in the tournament and the first time she faced break points in the final set. With this win, she is now just two victories away from securing her second major title of the year, following her Australian Open win in January. Gauff's match against Andreeva was marked by 42 unforced errors, including 12 double faults, but she showed composure by saving two match points and excelling in crucial moments during the third set. Andreeva, who made 14 unforced errors in the final set, expressed frustration and admitted she needed to release her emotions after the match. The semi-final line-up has been described as historic and exciting, with former British number one Annabel Croft commenting on the “intriguing matches” and the “warriors out on court.” The semi-finals will see Sabalenka face Pegula, while Rybakina takes on Gauff, who will have the support of the home crowd on Arthur Ashe Stadium. Gauff, who holds a 2-1 head-to-head advantage over Rybakina, said she has a different mindset and perspective this year, inspired by her improvements over the past year. Rybakina, however, downplayed the significance of becoming world number one, stating that the ranking is “just a number” and her focus remains on winning her third Grand Slam title.