The 33-year-old Strycova, who lost to Serena Williams in the singles, secured her first Grand Slam title in her long career as she and Hsieh beat China's Xu Yifan and Gabriela Dabrowski of Canada 6-2, 6-4.
The American has now become the oldest Grand Slam finalist in the Open era. She will fight for her 24th Grand Slam singles title against seventh seed Romanian Simona Halep.
Anastasija Sevastova beat Barbora Strycova of the Czech Republic 6-3, 6-4 to seal a place in the semi-finals.
Sania and Strycova, lost 4-6 3-6 in a match that lasted little over an hour.
Sania and Strycova, lost 4-6 3-6 in a match that lasted little over an hour.
A thrilling victory for Sania Mirza, over her fomer partner Martina Hingis!
A dissapointing straight-sets loss for the Indian star and her partner, Barbora Strycova.
The Indo-Czech pair needed around 64 minutes to beat Sara Errani of Italy and Alicja Rosolska of Poland 6-2, 6-3.
The Czechs will meet either the US or Germany in the semi-finals on April 22-23.
Serena will now face British player Johanna Kota, who eliminated Russia's Ekaterina Makarova.
