| Doubles | |
|---|---|
| 2021 Henderson Tennis Open | |
| Champions |  Quinn Gleason  Tereza Mihalíková |
| Runners-up | Emina Bektas  Tara Moore |
| Score | 7–6(7–5), 7–5 |
Olga Govortsova and Mandy Minella were the defending champions [1] but chose not to participate.
Quinn Gleason and Tereza Mihalíková won the title, defeating Emina Bektas and Tara Moore in the final, 7–6(7–5), 7–5.
Emina Bektas / Tara Moore (final) Quinn Gleason / Tereza Mihalíková (champions)
Yuriko Lily Miyazaki / 
Conny Perrin (first round) Hanna Chang / Hiroko Kuwata (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | E Bektas T Moore | 6 | 5 | [10] | |||||||||||||||||||||||
| S Chang A Glatch | 4 | 7 | [6] | 1 | E Bektas T Moore | 6 | 6 | ||||||||||||||||||||
 A Broomfield H Verner | 1 | 0 | A Kulikov R Valdes | 4 | 3 | ||||||||||||||||||||||
| A Kulikov R Valdes | 6 | 6 | 1 | E Bektas T Moore | 6 | 77 | |||||||||||||||||||||
| 4 | H Chang H Kuwata | 3 | 64 | H Giavara L Sun | 1 | 65 | |||||||||||||||||||||
| H Giavara L Sun | 6 | 77 | H Giavara L Sun | 6 | 6 | ||||||||||||||||||||||
| WC | T Mar E Oosterhout | 6 | 1 | [5] | J Aney R McAdoo | 4 | 4 | ||||||||||||||||||||
| J Aney R McAdoo | 3 | 6 | [10] | 1 | E Bektas T Moore | 65 | 5 | ||||||||||||||||||||
| N Hanatani A Zhu | 6 | 2 | [10] | 2 | Q Gleason T Mihalíková | 77 | 7 | ||||||||||||||||||||
| WC |  S Azran  M Helgesson | 4 | 6 | [8] | N Hanatani A Zhu | 4 | 4 | ||||||||||||||||||||
| D Hewitt C Van Nguyen | 3 | 6 | [10] | D Hewitt C Van Nguyen | 6 | 6 | |||||||||||||||||||||
| 3 | YL Miyazaki C Perrin | 6 | 4 | [8] | D Hewitt C Van Nguyen | 64 | 1 | ||||||||||||||||||||
| WC | A Parson-Siegel YR Sugai | 3 | 1 | 2 | Q Gleason T Mihalíková | 77 | 6 | ||||||||||||||||||||
| A Kiick A Riley | 6 | 6 | A Kiick A Riley | 0 | 1 | ||||||||||||||||||||||
 M Kononova R Newborn | 2 | 1 | 2 | Q Gleason T Mihalíková | 6 | 6 | |||||||||||||||||||||
| 2 | Q Gleason T Mihalíková | 6 | 6 | ||||||||||||||||||||||||
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