Moscow - Russian teenager Anastasia Potapova will face fellow 17-year-old Olga Danilovic of Serbia in Sunday's WTA Tour final in Moscow.
Former Wimbledon junior champion Potapova, the world No 204, overcame Slovenia's Tamara Zidansek after she retired while trailing 3-6, 6-4, 5-2 in their semi-final on Saturday.
The 187th-ranked Danilovic then defeated Belarusian fifth seed Aliaksandra Sasnovich 6-2, 5-7, 7-5 to set up a clash between two players who will be appearing in their first WTA final.
Moscow WTA results on Saturday (x denotes seeded player):
Olga Danilovic (SRB) bt Aliaksandra Sasnovich (BLR x5) 6-2, 5-7, 7-5
Anastasia Potapova (RUS) bt Tamara Zidansek (SLO) 3-6, 6-4, 5-2 retired