The Moscow River Cup final between Olga Danilovic and Anastasia Potapova is the first all-teen final since Charleston 2017 (19-year-old Daria Kasatkina d. 19-year-old Jelena Ostapenko) and the first final between players under 18 since the 2005 Japan Open (16-year-old Nicole Vaidisova d. 17-year-old Tatiana Golovin).
At 17 years and three months, Anastasia Potapova would be the youngest WTA titlist since Tamira Paszek won Portoroz 2006 at 15 years and nine months. Olga Danilovic, at 17 years and seven months, would be the youngest since Ana Konjuh won Nottingham 2015 at 17 years and six months. The winner will be the first player born in the 2000s to win a WTA trophy, and will take over the mantle of youngest active titlist from Marketa Vondrousova.
Olga Danilovic is bidding to become the first lucky loser ever to win a WTA title. The Serb lost to Paula Badosa Gibert in the final round of qualifying, and had booked her flight home before the withdrawals of Irina-Camelia Begu and Petra Martic opened up two lucky loser places in the draw.
Today marks Anastasia Potapova and Olga Danilovic's first meeting at senior level. The pair have been rivals at every junior level so far, with the Russian winning all five encounters in straight sets: once in the U12s, twice in the U14s (including the 2015 Les Petits As final 6-4, 6-4) and twice in U18s. This will also be their first clay-court clash, having played three times on indoor hard courts, once on outdoor hard courts and once on grass.
In Nanchang, Zheng Saisai and Wang Qiang will clash in just the third ever all-Chinese final in WTA history. Previously, Zheng Jie defeated Li Na at Estoril 2006 and Li Na beat Peng Shuai at Shenzhen 2014. It is the first title match between compatriots since Sloane Stephens defeated Madison Keys in last year's all-American US Open final.
Both Zheng Saisai and Wang Qiang will be playing their maiden final. Before this week, Zheng had reached three WTA semifinals - Tianjin 2014, Shenzhen 2015 and Nottingham 2015 - while Wang had made one, Hong Kong 2017.
The head-to-head between Zheng Saisai and Wang Qiang as all square at 2-2. Zheng won their first meeting in the 2015 Dalian 125K semifinals 7-6(4), 6-2, before Wang scored two victories in 2017, in Kuala Lumpur and Madrid. Zheng captured their most recent meeting in the first round of Wimbledon three weeks ago 6-3, 4-6, 6-1.
The Nanchang winner will become the eighth Chinese champion in WTA history, following Li Na (nine titles), Zheng Jie (four titles), Peng Shuai and Zhang Shuai (two titles each), and Sun Tiantian, Yan Zi and Duan Yingying (one title each).
ORDERS OF PLAY
MOSCOW RIVER CUP
CENTER (starts 1.30pm)
[LL] Olga DANILOVIC (SRB) vs [WC] Anastasia POTAPOVA (RUS)
After Suitable Rest - Anastasia POTAPOVA (RUS) / Vera ZVONAREVA (RUS) vs Kateryna KOZLOVA (UKR) / Natalia VIKHLYANTSEVA (RUS)
After Suitable Rest - Alexandra PANOVA (RUS) / Galina VOSKOBOEVA (KAZ) vs Anastasia POTAPOVA (RUS) / Vera ZVONAREVA (RUS) or Kateryna KOZLOVA (UKR) / Natalia VIKHLYANTSEVA (RUS)
CENTRE COURT (starts 5pm)
ZHENG Saisai (CHN)  vs WANG Qiang (CHN) 
JIANG Xinyu (CHN) / TANG Qianhui (CHN) vs LU Jing-Jing (CHN) / YOU Xiaodi (CHN)