| 2021 Transylvania Open | |
|---|---|
| Date | 25–31 October |
| Edition | 1st |
| Category | WTA 250 |
| Draw | 32S / 16Q / 16D |
| Prize money | $235,238 |
| Surface | Hard (Indoor) |
| Location | Cluj-Napoca, Romania |
| Venue | BT Arena |
| Champions | |
| Singles | |
 Anett Kontaveit | |
| Doubles | |
 Irina Bara /  Ekaterine Gorgodze | |
The 2021 Transylvania Open was a women's tennis tournament played on indoor hard courts.[1] It was the first edition of the Transylvania Open, and part of the WTA 250 series of the 2021 WTA Tour. It was held at the BT Arena in Cluj-Napoca, Romania, from 25 October until 31 October 2021. Second-seeded Anett Kontaveit won the singles title. By winning the title, Kontaveit qualified for the WTA Finals.[2]
Anett Kontaveit defeated Simona Halep, 6–2, 6–3
Irina Bara / Ekaterine Gorgodze defeated 
Aleksandra Krunić / 
Lesley Pattinama Kerkhove, 4–6, 6–1, [11–9].
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| ROU
|
Simona Halep | 19 | 1 |
| EST
|
Anett Kontaveit | 20 | 2 |
 GBR
|
Emma Raducanu | 24 | 3 |
 SUI
|
Jil Teichmann | 39 | 4 |
 AUS
|
Ajla Tomljanović | 43 | 5 |
 UKR
|
Marta Kostyuk | 53 | 6 |
| ROU
|
Irina-Camelia Begu | 56 | 7 |
| UKR
|
Anhelina Kalinina | 57 | 8 |
The following players received wildcards into the main draw:
The following players received entry using a protected ranking:
The following players received entry from the qualifying draw:
Anna Bondár
Anastasia Gasanova Alexandra Ignatik Aleksandra Krunić Lesley Pattinama Kerkhove Lesia TsurenkoThe following player received entry as a lucky loser:
Ekaterina Alexandrova → replaced by 
Polona Hercog
Paula Badosa → replaced by 
Anna-Lena Friedsam Viktorija Golubic → replaced by 
Alison Van Uytvanck Kaia Kanepi → replaced by Ivana Jorović Veronika Kudermetova → replaced by 
Bernarda Pera Elise Mertens → replaced by Elena-Gabriela Ruse
Camila Osorio → replaced by 
Jana Fett
Mayar Sherif → replaced by Mona Barthel| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
| USA
|
Kaitlyn Christian |  NZL
|
Erin Routliffe | 107 | 1 |
| SRB
|
Aleksandra Krunić | NED
|
Lesley Pattinama Kerkhove | 123 | 2 |
| ROU
|
Monica Niculescu | ROU
|
Elena-Gabriela Ruse | 140 | 3 |
 KAZ
|
Anna Danilina |  NOR
|
Ulrikke Eikeri | 153 | 4 |
The following pairs received wildcards into the doubles main draw:
Sharon Fichman / 
Giuliana Olmos → replaced by Alena Fomina-Klotz / Ekaterina Yashina Ulrikke Eikeri / Catherine Harrison → replaced by Anna Danilina / Ulrikke Eikeri
