Ostapenko reached her first Grand Slam singles final with a 7-6 (4), 3-6, 6-3 victory over 30th-seeded Timea Bacsinszky on her 20th birthday.
Ostapenko is the first Latvian to reach a Grand Slam singles final and the youngest player to reach one since Caroline Wozniacki made the 2009 United States Open final at 19. Also , Ostapenko became the first unseeded player to reach the final here in singles since 1983.
Third-seeded Simona Halep won 6-4, 3-6, 6-3, clinched victory over Karolina Pliskova in three sets.
Ostapenko will face third-seeded Simona Halep in the final. Halep, who beat second-seeded Karolina Pliskova, 6-4, 3-6, 6-3 in semifinals of French Open.
Saturday’s final will see a new Grand Slam champion crowned, and a new name at the top of the rankings and if Simona Halep wins she will overtake Angelique Kerber.
Simona Halep, who lost to Maria Sharapova in the 2014 French Open final said “It is nice to be in the final again. I hope I can play better and win it. I’m playing a young player – it is a big challenge.”