| Doubles | |
|---|---|
| 2021 Korea Open | |
| Champions |  Choi Ji-hee Han Na-lae |
| Runners-up |  Valentini Grammatikopoulou  Réka Luca Jani |
| Score | 6–4, 6–4 |
| Draw | 8 |
| Seeds | 2 |
Lara Arruabarrena and Tatjana Maria were the reigning champions, but chose not to participate.
Choi Ji-hee and Han Na-lae won the title, defeating Valentini Grammatikopoulou and Réka Luca Jani in the final, 6–4, 6–4. [1]
Arianne Hartono / 
Olivia Tjandramulia (quarterfinals) Valentini Grammatikopoulou / Réka Luca Jani (final)| Quarterfinals | Semifinals | Final | ||||||||||||||||||
| 1 | A Hartono O Tjandramulia | 2 | 4 | |||||||||||||||||
| J-h Choi N-l Han | 6 | 6 | ||||||||||||||||||
| J-h Choi N-l Han | 6 | 6 | ||||||||||||||||||
S-j Jang  I Shinikova | 0 | 2 | ||||||||||||||||||
| S-j Jang I Shinikova | 7 | 6 | ||||||||||||||||||
 R Bhatia  A Kulikova | 5 | 0 | ||||||||||||||||||
| J-h Choi N-l Han | 6 | 6 | ||||||||||||||||||
| 2 | V Grammatikopoulou RL Jani | 4 | 4 | |||||||||||||||||
 F Contreras  Y Naito | 7 | 4 | [10] | |||||||||||||||||
| WC | B-y Jeong Y-w Jeong | 5 | 6 | [6] | ||||||||||||||||
| F Contreras Y Naito | 2 | 6 | [4] | |||||||||||||||||
| 2 | V Grammatikopoulou RL Jani | 6 | 1 | [10] | ||||||||||||||||
 P Plipuech  L Zhu | 1 | 4 | ||||||||||||||||||
| 2 | V Grammatikopoulou RL Jani | 6 | 6 | |||||||||||||||||
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Choi Ji-hee is a professional South Korean tennis player.
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