# 2024 San Diego Open – Singles

Katie Boulter defeated Marta Kostyuk in the final, 5–7, 6–2, 6–2 to win the singles tennis title at the 2024 San Diego Open. It was her second WTA Tour title.
Barbora Krejčíková was the reigning champion, but chose not to compete this year.

## Seeds

The top four seeds received a bye into the second round.
* Jessica Pegula (semifinals)
* Beatriz Haddad Maia (second round)
* Emma Navarro (semifinals)
* Anastasia Pavlyuchenkova (quarterfinals)
* Dayana Yastremska (second round)
* Marta Kostyuk (final)
* Donna Vekić (quarterfinals)
* Leylah Fernandez (first round, retired)

## 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 | Final |
| 1 | Jessica Pegula | 6$^4$ | 1 | | | | | |
| 6 | Marta Kostyuk | 7$^7$ | 6 | | | | | |
| 6 | Marta Kostyuk | 7$^7$ | 6 | 6 | Marta Kostyuk | 7 | 2 | 2 |
| | | | | | Katie Boulter | 5 | 6 | 6 |
| 3 | Emma Navarro | 3 | 1 | | Katie Boulter | 5 | 6 | 6 |
| | Katie Boulter | 6 | 6 | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | J Pegula | 6 | 6 | | | | | | | | | | |
| Q | J Niemeier | 6 | 6 | | Q | J Niemeier | 0 | 4 | | | | | | | | | | |
| | V Gracheva | 3 | 0 | | | | | | | 1 | J Pegula | 6 | 2 | 6 | | | | |
| WC | C Wozniacki | 6 | 4 | 1 | | | | | | | A Blinkova | 1 | 6 | 2 | | | | |
| | A Blinkova | 1 | 6 | 6 | | A Blinkova | 7$^8$ | 6 | | | | | | | | | | |
| | C Dolehide | 4 | 7 | 1 | 5 | D Yastremska | 6$^6$ | 2 | | | | | | | | | | |
| 5 | D Yastremska | 6 | 5 | 6 | | | | | | | | | | | 1 | J Pegula | 6$^4$ | 1 |
| | | | | | | | | | | | | | | | 6 | M Kostyuk | 7$^7$ | 6 |
| | | | | | 4 | A Pavlyuchenkova | 4 | 7$^7$ | 6 | | | | | | | | | |
| | C Tauson | 2 | 6 | 1 | | Xin Wang | 6 | 6$^5$ | 2 | | | | | | | | | |
| | Xin Wang | 6 | 2 | 6 | | | | | | 4 | A Pavlyuchenkova | 6 | 4 | 3 | | | | |
| WC | T Preston | 6 | 4 | 6 | | | | | | 6 | M Kostyuk | 3 | 6 | 6 | | | | |
| | M Fręch | 4 | 6 | 1 | WC | T Preston | 4 | 3 | | | | | | | | | | |
| Q | A Li | 4 | 6 | 2 | 6 | M Kostyuk | 6 | 6 | | | | | | | | | | |
| 6 | M Kostyuk | 6 | 4 | 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 |
| 8 | L Fernandez | 7$^9$ | 0$^r$ | | | | | | | | | | | | | | |
| | T Maria | 6$^7$ | 4 | | | T Maria | 7 | 6$^2$ | 2 | | | | | | | | |
| Q | D Saville | 6 | 6 | | Q | D Saville | 5 | 7$^7$ | 6 | | | | | | | | |
| | L Zhu | 3 | 3 | | | | | | | Q | D Saville | 4 | 2 | | | | |
| Q | M Hontama | 3 | 1 | | | | | | | 3 | E Navarro | 6 | 6 | | | | |
| | K Siniaková | 6 | 6 | | | K Siniaková | 3 | 6 | 1 | | | | | | | | |
| | | | | | 3 | E Navarro | 6 | 3 | 6 | | | | | | | | |
| | | | | | | | | | | | | | | 3 | E Navarro | 3 | 1 |
| 7 | D Vekić | 7 | 6 | | | | | | | | | | | | K Boulter | 6 | 6 |
| WC | K Hui | 5 | 2 | | 7 | D Vekić | 6 | 3 | 6 | | | | | | | | |
| Q | M Melnikova | 4 | 7 | 1 | Q | M Stakusic | 4 | 6 | 3 | | | | | | | | |
| Q | M Stakusic | 6 | 5 | 6 | | | | | | 7 | D Vekić | 4 | 3 | | | | |
| | L Tsurenko | 3 | 1 | | | | | | | | K Boulter | 6 | 6 | | | | |
| | K Boulter | 6 | 6 | | | K Boulter | 3 | 6 | 6 | | | | | | | | |
| | | | | | 2 | B Haddad Maia | 6 | 3 | 4 | | | | | | | | |

## Qualifying
### Seeds

* Jodie Burrage (first round)
* Kayla Day (qualifying competition)
* Maria Timofeeva (first round, retired)
* Claire Liu (qualifying competition)
* Mai Hontama (qualified)
* Linda Fruhvirtová (qualifying competition)
* Jule Niemeier (qualified)
* Rebecca Šramková (qualifying competition)
* Dalma Gálfi (qualifying competition)
* Daria Saville (qualified)
* Elsa Jacquemot (qualifying competition)
* Ann Li (qualified)

### Qualifiers

* Marina Melnikova
* Ann Li
* Marina Stakusic
* Jule Niemeier
* Mai Hontama
* Daria Saville

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Jodie Burrage | 1 | 6$^2$ | | | | | |
| | Marina Melnikova | 6 | 7$^7$ | | | | | |
| | Marina Melnikova | 6 | 7$^7$ | | Marina Melnikova | 4 | 6 | 6 |
| | | | | 8 | Rebecca Šramková | 6 | 2 | 4 |
| | Ekaterina Makarova | 3 | 2 | 8 | Rebecca Šramková | 6 | 2 | 4 |
| 8 | Rebecca Šramková | 6 | 6 | | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Kayla Day | 6 | 6 | | | | |
| WC | Madison Sieg | 3 | 3 | | | | |
| WC | Madison Sieg | 3 | 3 | 2 | Kayla Day | 3 | 0 |
| | | | | 12 | Ann Li | 6 | 6 |
| WC | Alyssa Ahn | 5 | 5 | 12 | Ann Li | 6 | 6 |
| 12 | Ann Li | 7 | 7 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Maria Timofeeva | 2 | 0$^r$ | | | | |
| WC | Marina Stakusic | 6 | 3 | | | | |
| WC | Marina Stakusic | 6 | 3 | WC | Marina Stakusic | 6 | 6 |
| | | | | 11 | Elsa Jacquemot | 3 | 4 |
| WC | Haley Giavara | 3 | 2 | 11 | Elsa Jacquemot | 3 | 4 |
| 11 | Elsa Jacquemot | 6 | 6 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Claire Liu | 6 | 6 | | | | | |
| | Stacey Fung | 3 | 4 | | | | | |
| | Stacey Fung | 3 | 4 | | 4 | Claire Liu | 4 | 2 |
| | | | | | 7 | Jule Niemeier | 6 | 6 |
| | Natalija Stevanović | 6$^5$ | 6 | 4 | 7 | Jule Niemeier | 6 | 6 |
| 7 | Jule Niemeier | 7$^7$ | 3 | 6 | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Mai Hontama | 6 | 6 | | | | |
| | Despina Papamichail | 3 | 4 | | | | |
| | Despina Papamichail | 3 | 4 | 5 | Mai Hontama | 7$^7$ | 6 |
| | | | | 9 | Dalma Gálfi | 6$^4$ | 4 |
| | Lesley Pattinama Kerkhove | 3 | 5 | 9 | Dalma Gálfi | 6$^4$ | 4 |
| 9 | Dalma Gálfi | 6 | 7 | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Linda Fruhvirtová | 6 | 6 | | | | |
| | Jana Kolodynska | 2 | 0 | | | | |
| | Jana Kolodynska | 2 | 0 | 6 | Linda Fruhvirtová | 4 | 1 |
| | | | | 10 | Daria Saville | 6 | 6 |
| | Hanna Chang | 2 | 2 | 10 | Daria Saville | 6 | 6 |
| 10 | Daria Saville | 6 | 6 | | | | |