# 2023 Porsche Tennis Grand Prix – Singles

Defending champion Iga Świątek defeated Aryna Sabalenka in a rematch of the previous year's final, 6–3, 6–4 to win the singles tennis title at the 2023 Stuttgart Open. The final marked the first time the top two players in the world contested a WTA Tour final since the 2018 Australian Open, and the first such match overall since 2019 WTA Finals. This was also the first time since 2005 that the two defending Stuttgart finalists returned to contest the following year's final.

## Seeds

The top four seeds received a bye into the second round.
* Iga Świątek (champion)
* Aryna Sabalenka (final)
* Ons Jabeur (semifinals, retired)
* Caroline Garcia (quarterfinals)
* Coco Gauff (second round)
* Elena Rybakina (second round, retired)
* Daria Kasatkina (first round)
* Maria Sakkari (first round)

## 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 | Final | Final | Final | Final |
| 1 | Iga Świątek | 3 | | | | | |
| 3 | Ons Jabeur | 0$^r$ | | | | | |
| 3 | Ons Jabeur | 0$^r$ | | 1 | Iga Świątek | 6 | 6 |
| | | | | 2 | Aryna Sabalenka | 3 | 4 |
| | Anastasia Potapova | 1 | 2 | 2 | Aryna Sabalenka | 3 | 4 |
| 2 | Aryna Sabalenka | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| | | | | 1 | I Świątek | 6 | 6 | | | | | | | | | |
| | Q Zheng | 6 | 6 | | Q Zheng | 1 | 4 | | | | | | | | | |
| LL | A Parks | 4 | 4 | | | | | | 1 | I Świątek | 4 | 6 | 6 | | | |
| | E Alexandrova | 6$^7$ | 6$^5$ | | | | | | | Ka Plíšková | 6 | 1 | 2 | | | |
| | D Vekić | 7$^9$ | 7$^7$ | | D Vekić | 2 | 7$^7$ | 6$^5$ | | | | | | | | |
| | Ka Plíšková | 6 | 6 | | Ka Plíšková | 6 | 6$^5$ | 7$^7$ | | | | | | | | |
| 8 | M Sakkari | 2 | 3 | | | | | | | | | | | 1 | I Świątek | 3 |
| | | | | | | | | | | | | | | 3 | O Jabeur | 0$^r$ |
| | | | | 3 | O Jabeur | 1 | 7 | 6 | | | | | | | | |
| | J Ostapenko | 6 | 6 | | J Ostapenko | 6 | 5 | 3 | | | | | | | | |
| WC | E Raducanu | 2 | 1 | | | | | | 3 | O Jabeur | 6 | 6 | | | | |
| | M Trevisan | 5 | 1$^r$ | | | | | | | B Haddad Maia | 3 | 0 | | | | |
| | B Haddad Maia | 7 | 1 | | B Haddad Maia | 6 | 3 | | | | | | | | | |
| WC | J Niemeier | 5 | 3 | 6 | E Rybakina | 1 | 1$^r$ | | | | | | | | | |
| 6 | E Rybakina | 7 | 6 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | C Gauff | 6 | 4 | 7$^7$ | | | | | | | | | | | | | |
| | V Kudermetova | 2 | 6 | 6$^3$ | 5 | C Gauff | 2 | 3 | | | | | | | | | |
| Q | P Martić | 3 | 6 | 6$^4$ | | A Potapova | 6 | 6 | | | | | | | | | |
| | A Potapova | 6 | 3 | 7$^7$ | | | | | | A Potapova | 4 | 6 | 6 | | | | |
| WC | T Maria | 6 | 4 | 7$^7$ | | | | | 4 | C Garcia | 6 | 3 | 3 | | | | |
| Q | Y In-Albon | 2 | 6 | 6$^4$ | WC | T Maria | 6$^5$ | 4 | | | | | | | | | |
| | | | | | 4 | C Garcia | 7$^7$ | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | | A Potapova | 1 | 2 |
| 7 | D Kasatkina | 1 | 1 | | | | | | | | | | | 2 | A Sabalenka | 6 | 6 |
| WC | P Badosa | 6 | 6 | | WC | P Badosa | 6 | 6 | | | | | | | | | |
| Q | C Bucșa | 3 | 6 | 6 | Q | C Bucșa | 1 | 2 | | | | | | | | | |
| Q | T Korpatsch | 6 | 4 | 0 | | | | | WC | P Badosa | 6 | 4 | 4 | | | | |
| | B Krejčíková | 6 | 6 | | | | | | 2 | A Sabalenka | 4 | 6 | 6 | | | | |
| | L Samsonova | 2 | 0 | | | B Krejčíková | 2 | 3 | | | | | | | | | |
| | | | | | 2 | A Sabalenka | 6 | 6 | | | | | | | | | |

## Qualifying
### Seeds

* Petra Martić (qualified)
* Alycia Parks (qualifying competition, lucky loser)
* Linda Fruhvirtová (qualifying competition)
* Katie Volynets (qualifying competition)
* Cristina Bucșa (qualified)
* Tamara Korpatsch (qualified)
* Kimberly Birrell (first round)
* Ylena In-Albon (qualified)

### Qualifiers

* Petra Martić
* Tamara Korpatsch
* Ylena In-Albon
* Cristina Bucșa

### Lucky loser

* Alycia Parks

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Petra Martić | 6 | 6 | | | | |
| | Nigina Abduraimova | 4 | 2 | | | | |
| | Nigina Abduraimova | 4 | 2 | 1 | Petra Martić | 6 | 7 |
| | | | | WC | Sabine Lisicki | 4 | 5 |
| WC | Sabine Lisicki | 6 | 6 | WC | Sabine Lisicki | 4 | 5 |
| 7 | Kimberly Birrell | 3 | 4 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Alycia Parks | 1 | 6 | 6 | | | | |
| | Ana Konjuh | 6 | 2 | 4 | | | | |
| | Ana Konjuh | 6 | 2 | 4 | 2 | Alycia Parks | 2 | 4 |
| | | | | | 6 | Tamara Korpatsch | 6 | 6 |
| | Kathinka von Deichmann | 2 | 6$^5$ | | 6 | Tamara Korpatsch | 6 | 6 |
| 6 | Tamara Korpatsch | 6 | 7$^7$ | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Linda Fruhvirtová | 7$^7$ | 7$^7$ | | | | | |
| WC | Ella Seidel | 6$^5$ | 6$^4$ | | | | | |
| WC | Ella Seidel | 6$^5$ | 6$^4$ | | 3 | Linda Fruhvirtová | 5 | 4 |
| | | | | | 8 | Ylena In-Albon | 7 | 6 |
| | Mona Barthel | 3 | 7$^7$ | 5 | 8 | Ylena In-Albon | 7 | 6 |
| 8 | Ylena In-Albon | 6 | 6$^2$ | 7 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Katie Volynets | 2 | 7$^7$ | 6 | | | | | |
| | Dayana Yastremska | 6 | 6$^3$ | 3 | | | | | |
| | Dayana Yastremska | 6 | 6$^3$ | 3 | 4 | Katie Volynets | 5 | 7$^7$ | 6$^2$ |
| | | | | | 5 | Cristina Bucșa | 7 | 6$^4$ | 7$^7$ |
| | Noma Noha Akugue | 4 | 4 | | 5 | Cristina Bucșa | 7 | 6$^4$ | 7$^7$ |
| 5 | Cristina Bucșa | 6 | 6 | | | | | | |