Latvia's Jelena Ostapenko became the first unseeded player to reach the French Open final in 34 years by beating Timea Bacsinszky.
The 20-year-old defeated the Swiss 7-6 (7-4) 3-6 6-3 on Thursday to stay on course for a first WTA title.
Mimi Jausovec was the last unseeded player to reach the French Open final in 1983.
Ostapenko will play either Czech world number three Karolina Pliskova or Romania's Simona Halep on Saturday.
More to follow.