2021 St. Petersburg Ladies' Trophy – Doubles
| Doubles | |
|---|---|
| 2021 St. Petersburg Ladies' Trophy | |
| Champions | Nadiia Kichenok Raluca Olaru |
| Runners-up | Kaitlyn Christian Sabrina Santamaria |
| Score | 2–6, 6–3, [10–8] |
Shuko Aoyama and Ena Shibahara were the defending champions, but they decided not to participate this year.
Nadiia Kichenok and Raluca Olaru won the title, defeating Kaitlyn Christian and Sabrina Santamaria in the final, 2–6, 6–3, [10–8].