Coco Gauff saved two match points to defeat reigning French Open champion Mirra Andreeva 2-6, 7-6 , 6-2 in a US Open quarter-final on Wednesday.
Fourth-ranked Gauff, a 22-year-old American and two-time Grand Slam winner, advanced to Thursday's semi-finals, where she will face Kazakh star Elena Rybakina.
Rybakina will jump to world number one in next week's rankings after beating Chinese qualifier Zheng Qinwen 3-6, 6-1, 6-4.
Rybakina has a 1-1 career record against Gauff, winning a semi-final last month in Canada after Gauff won their only other meeting in Canada in 2022.
Fifth-ranked Andreeva, a 19-year-old Russian, won her first major title at Roland Garros but was foiled despite owning two match points in the second set tie-breaker.
