Ostrava Open News
This was Sania's second final of the season, following a runner-up finish at the WTA 250 Cleveland event in the USA last month with Christina McHale.
The rebranded Fed Cup tournament will be held on indoor hard courts at the O2 Arena in Prague on 1-6 November after the Czech capital replaced Budapest as the host city earlier this year.
The 29-year-old Czech player was set to be the top seed at the WTA tournament played in the eastern Czech city of Ostrava on 20-26 September.
Ostrava Open: Aryna Sabalenka wins 12 straight games against qualifier Sara Sorribes Tormo in comeback
Aryna Sabalenka lost the first ten games before miraculously recovering to find the court with her groundstrokes and went on to take the next 12 games for a 0-6, 6-4, 6-0 win.
Ostrava Open: Aryna Sabalenka back from brink to defeat Coco Gauff in thriller; second-seed Karolina Pliskova suffers upset
The big-hitting Sabalenka, the world number 12, took two hours and 13 minutes to beat 55th-ranked Gauff 1-6, 7-5, 7-6 (7/2).