# 2021 BGL Luxembourg Open – Singles

Clara Tauson defeated defending champion Jeļena Ostapenko in the final, 6–3, 4–6, 6–4 to win the singles tennis title at the 2021 Luxembourg Open. It was her second WTA Tour singles title.

## Seeds

* Belinda Bencic (quarterfinals)
* Elise Mertens (quarterfinals)
* Jeļena Ostapenko (final)
* Ekaterina Alexandrova (second round)
* Markéta Vondroušová (semifinals)
* Zhang Shuai (first round)
* Liudmila Samsonova (semifinals)
* Alizé Cornet (quarterfinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 7 | Liudmila Samsonova | 1 | 6$^4$ | | | | | | |
| 3 | Jeļena Ostapenko | 6 | 7$^7$ | | | | | | |
| 3 | Jeļena Ostapenko | 6 | 7$^7$ | | 3 | Jeļena Ostapenko | 3 | 6 | 4 |
| | | | | | | Clara Tauson | 6 | 4 | 6 |
| | Clara Tauson | 6 | 2 | 6 | | Clara Tauson | 6 | 4 | 6 |
| 5 | Markéta Vondroušová | 4 | 6 | 4 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | B Bencic | 6 | 6 | | | | | | | | | |
| | Z Diyas | 6 | 1 | 6 | | Z Diyas | 1 | 3 | | | | | | | | | |
| | AK Schmiedlová | 0 | 6 | 4 | | | | | | 1 | B Bencic | 1 | 4 | | | | |
| | O Dodin | 6$^4$ | 6 | 6 | | | | | | 7 | L Samsonova | 6 | 6 | | | | |
| Q | A Zakharova | 7$^7$ | 4 | 3 | | O Dodin | 6$^5$ | 6$^3$ | | | | | | | | | |
| | M Doi | 2 | 3 | | 7 | L Samsonova | 7$^7$ | 7$^7$ | | | | | | | | | |
| 7 | L Samsonova | 6 | 6 | | | | | | | | | | | 7 | L Samsonova | 1 | 6$^4$ |
| 3 | J Ostapenko | 6 | 6 | | | | | | | | | | | 3 | J Ostapenko | 6 | 7$^7$ |
| Q | J Niemeier | 2 | 2 | | 3 | J Ostapenko | 6 | 4 | 6 | | | | | | | | |
| Q | A Hartono | 7$^7$ | 3 | 7$^7$ | Q | A Hartono | 2 | 6 | 1 | | | | | | | | |
| WC | A-L Friedsam | 6$^5$ | 6 | 6$^4$ | | | | | | 3 | J Ostapenko | 7$^8$ | 6 | | | | |
| | V Gracheva | 3 | 4 | | | | | | | 8 | A Cornet | 6$^6$ | 2 | | | | |
| WC | M Minella | 6 | 6 | | WC | M Minella | 3 | 3 | | | | | | | | | |
| | A Potapova | 4 | 2 | | 8 | A Cornet | 6 | 6 | | | | | | | | | |
| 8 | A Cornet | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | S Zhang | 2 | 7$^7$ | 3 | | | | | | | | | | | | | | |
| | M Bouzková | 6 | 6$^3$ | 6 | | M Bouzková | 6 | 6 | | | | | | | | | | |
| | G Minnen | 7$^7$ | 6$^1$ | 7$^7$ | | G Minnen | 3 | 1 | | | | | | | | | | |
| | N Párrizas Díaz | 6$^4$ | 7$^7$ | 6$^2$ | | | | | | | M Bouzková | 3 | 2 | | | | | |
| | A Sharma | 2 | 2 | | | | | | | | C Tauson | 6 | 6 | | | | | |
| | C Tauson | 6 | 6 | | | C Tauson | 6 | 3 | 7$^7$ | | | | | | | | | |
| WC | S Vögele | 1 | 6 | 3 | 4 | E Alexandrova | 4 | 6 | 6$^1$ | | | | | | | | | |
| 4 | E Alexandrova | 6 | 3 | 6 | | | | | | | | | | | C Tauson | 6 | 2 | 6 |
| 5 | M Vondroušová | 6 | 6 | | | | | | | | | | | 5 | M Vondroušová | 4 | 6 | 4 |
| | A Van Uytvanck | 2 | 3 | | 5 | M Vondroušová | 6 | 6 | | | | | | | | | | |
| Q | E Makarova | 3 | 3 | | Q | J Fett | 2 | 4 | | | | | | | | | | |
| Q | J Fett | 6 | 6 | | | | | | | 5 | M Vondroušová | 7 | 6 | | | | | |
| Q | L Tsurenko | 5 | 6$^6$ | | | | | | | 2 | E Mertens | 5 | 2 | | | | | |
| | A Sasnovich | 7 | 7$^8$ | | | A Sasnovich | 6 | 2 | 5 | | | | | | | | | |
| | | | | | 2 | E Mertens | 3 | 6 | 7 | | | | | | | | | |

## Qualifying
### Seeds

* Astra Sharma (moved to main draw)
* Vitalia Diatchenko (first round, retired)
* Jule Niemeier (qualified)
* Tamara Korpatsch (first round)
* Cristina Bucșa (qualifying competition)
* Anastasia Gasanova (qualifying competition)
* Natalia Vikhlyantseva (first round)
* Lesia Tsurenko (qualified)
* Lara Arruabarrena (first round)
* Indy de Vroome (first round)
* Jana Fett (qualified)
* Isabella Shinikova (first round)

### Qualifiers

* Anastasia Zakharova
* Ekaterina Makarova
* Jule Niemeier
* Arianne Hartono
* Lesia Tsurenko
* Jana Fett

### Draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| Alt | Makoto Ninomiya | 6 | 6 | | | | |
| | Ulrikke Eikeri | 4 | 3 | | | | |
| | Ulrikke Eikeri | 4 | 3 | Alt | Makoto Ninomiya | 0 | 3 |
| | | | | | Anastasia Zakharova | 6 | 6 |
| | Anastasia Zakharova | 6 | 6 | | Anastasia Zakharova | 6 | 6 |
| 9 | Lara Arruabarrena | 4 | 3 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Vitalia Diatchenko | 5 | 1$^r$ | | | | |
| | Ekaterina Makarova | 7 | 4 | | | | |
| | Ekaterina Makarova | 7 | 4 | | Ekaterina Makarova | 6 | 6 |
| | | | | | Yana Morderger | 3 | 0 |
| | Yana Morderger | 4 | 7$^7$ | 6 | Yana Morderger | 3 | 0 |
| 10 | Indy de Vroome | 6 | 6$^3$ | 3 | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Jule Niemeier | 7$^7$ | 4 | 6 | | | | | |
| | Lena Papadakis | 6$^3$ | 6 | 3 | | | | | |
| | Lena Papadakis | 6$^3$ | 6 | 3 | 3 | Jule Niemeier | 6$^3$ | 6 | 6 |
| | | | | | | Tereza Smitková | 7$^7$ | 3 | 4 |
| | Tereza Smitková | 6 | 6 | | | Tereza Smitková | 7$^7$ | 3 | 4 |
| 7 | Natalia Vikhlyantseva | 4 | 0 | | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Tamara Korpatsch | 0 | 2 | | | |
| | Arianne Hartono | 6 | 6 | | | |
| | Arianne Hartono | 6 | 6 | Arianne Hartono | 7 | 6 |
| | | | | Tayisiya Morderger | 5 | 2 |
| | Tayisiya Morderger | 7$^7$ | 6 | Tayisiya Morderger | 5 | 2 |
| 12 | Isabella Shinikova | 6$^5$ | 3 | | | |

#### Fifth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Cristina Bucșa | 6 | 6 | | | | | | |
| WC | Marie Weckerle | 1 | 2 | | | | | | |
| WC | Marie Weckerle | 1 | 2 | | 5 | Cristina Bucșa | 3 | 6 | 4 |
| | | | | | 8 | Lesia Tsurenko | 6 | 2 | 6 |
| | Eri Hozumi | 3 | 6 | 2 | 8 | Lesia Tsurenko | 6 | 2 | 6 |
| 8 | Lesia Tsurenko | 6 | 3 | 6 | | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Anastasia Gasanova | 7 | 6 | | | | |
| | Olivia Tjandramulia | 5 | 0 | | | | |
| | Olivia Tjandramulia | 5 | 0 | 6 | Anastasia Gasanova | 1 | 0 |
| | | | | 11 | Jana Fett | 6 | 6 |
| | Angelina Gabueva | 6$^3$ | 2 | 11 | Jana Fett | 6 | 6 |
| 11 | Jana Fett | 7$^7$ | 6 | | | | |