# 2018 Silicon Valley Classic – Singles

Madison Keys was the defending champion, but withdrew due to a wrist injury.
Mihaela Buzărnescu won her first WTA Tour singles title, defeating Maria Sakkari in the final, 6–1, 6–0.

## Seeds

The top four seeds received a bye into the second round.
* Garbiñe Muguruza (withdrew)
* Madison Keys (withdrew)
* Venus Williams (quarterfinals)
* Elise Mertens (semifinals)
* Mihaela Buzărnescu (champion)
* Serena Williams (first round)
* Zhang Shuai (first round)
* Tímea Babos (second round)
Note: Aryna Sabalenka, who would have been placed in the entry list on the initial entry cutoff date of June 18, 2018 and seeded 7th, entered late and played the qualifying tournament. But she was eliminated in qualifying matches.

## 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 |
| | Danielle Collins | 6 | 5 | 2 | | | | |
| | Maria Sakkari | 3 | 7 | 6 | | | | |
| | Maria Sakkari | 3 | 7 | 6 | | Maria Sakkari | 1 | 0 |
| | | | | | 5 | Mihaela Buzărnescu | 6 | 6 |
| 4 | Elise Mertens | 6 | 3 | 1 | 5 | Mihaela Buzărnescu | 6 | 6 |
| 5 | Mihaela Buzărnescu | 4 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | LL | A Blinkova | 1 | 0 | | | | | | | | | |
| | V Azarenka | 6 | 6$^7$ | 7 | | V Azarenka | 6 | 6 | | | | | | | | | |
| | K Bondarenko | 3 | 7$^9$ | 5 | | | | | | | V Azarenka | 7$^7$ | 0$^r$ | | | | |
| | D Collins | 7$^7$ | 6 | | | | | | | | D Collins | 6$^4$ | 3 | | | | |
| Q | D Lao | 6$^2$ | 3 | | | D Collins | 6 | 3 | 6 | | | | | | | | |
| | V Lapko | 7$^7$ | 6 | | | V Lapko | 1 | 6 | 1 | | | | | | | | |
| 7 | S Zhang | 6$^2$ | 0 | | | | | | | | | | | D Collins | 6 | 5 | 2 |
| | | | | | | | | | | | | | | M Sakkari | 3 | 7 | 6 |
| | | | | | 3/WC | V Williams | 6 | 4 | 6 | | | | | | | | |
| | H Watson | 6 | 3 | 6 | | H Watson | 4 | 6 | 0 | | | | | | | | |
| WC | C Liu | 4 | 6 | 4 | | | | | | 3/WC | V Williams | 4 | 6$^2$ | | | | |
| | M Sakkari | 6 | 6 | | | | | | | | M Sakkari | 6 | 7$^7$ | | | | |
| | C McHale | 2 | 2 | | | M Sakkari | 6 | 6 | | | | | | | | | |
| | K Mladenovic | 4 | 2 | | 8 | T Babos | 0 | 1 | | | | | | | | | |
| 8 | T Babos | 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/PR | S Williams | 1 | 0 | | | | | | | | | | | | | | | |
| | J Konta | 6 | 6 | | | J Konta | 6 | 6 | | | | | | | | | | |
| | S Kenin | 6 | 6 | | | S Kenin | 1 | 4 | | | | | | | | | | |
| Q | V Cepede Royg | 4 | 4 | | | | | | | | J Konta | 6$^4$ | 3 | | | | | |
| WC | A Kratzer | 6 | 4 | 7 | | | | | | 4 | E Mertens | 7$^7$ | 6 | | | | | |
| | A Riske | 4 | 6 | 5 | WC | A Kratzer | 2 | 0 | | | | | | | | | | |
| | | | | | 4 | E Mertens | 6 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | 4 | E Mertens | 6 | 3 | 1 |
| 5 | M Buzărnescu | 6 | 4 | 6 | | | | | | | | | | 5 | M Buzărnescu | 4 | 6 | 6 |
| | S Vickery | 3 | 6 | 3 | 5 | M Buzărnescu | 7 | 2 | 6 | | | | | | | | | |
| | Q Wang | 2 | 5 | | Q | A Anisimova | 5 | 6 | 1 | | | | | | | | | |
| Q | A Anisimova | 6 | 7 | | | | | | | 5 | M Buzărnescu | 6 | 7 | | | | | |
| | A Tomljanović | 6 | 6 | | | | | | | | A Tomljanović | 1 | 5 | | | | | |
| Q | G García Pérez | 4 | 1 | | | A Tomljanović | 6 | 3 | 6 | | | | | | | | | |
| | | | | | LL | M Fręch | 4 | 6 | 3 | | | | | | | | | |

## Qualifying
### Seeds

* Aryna Sabalenka (first round)
* Anna Blinkova (qualifying competition, lucky loser)
* Nicole Gibbs (first round)
* Magdalena Fręch (qualifying competition, lucky loser)
* Verónica Cepede Royg (qualified)
* Irina Falconi (qualifying competition)
* Georgina García Pérez (qualified)
* Amanda Anisimova (qualified)

### Qualifiers

* Georgina García Pérez
* Amanda Anisimova
* Danielle Lao
* Verónica Cepede Royg

### Lucky losers

* Anna Blinkova
* Magdalena Fręch

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Aryna Sabalenka | 6 | 5 | 4 | | | | |
| | Maria Sanchez | 2 | 7 | 6 | | | | |
| | Maria Sanchez | 2 | 7 | 6 | | Maria Sanchez | 6$^4$ | 6$^3$ |
| | | | | | 7 | Georgina García Pérez | 7$^7$ | 7$^7$ |
| | Miyu Kato | 4 | 2 | | 7 | Georgina García Pérez | 7$^7$ | 7$^7$ |
| 7 | Georgina García Pérez | 6 | 6 | | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Anna Blinkova | 6 | 6 | | | | | |
| WC | Sybille Gauvain | 0 | 3 | | | | | |
| WC | Sybille Gauvain | 0 | 3 | 2 | Anna Blinkova | 7 | 3 | 6$^5$ |
| | | | | 8 | Amanda Anisimova | 5 | 6 | 7$^7$ |
| | Priscilla Hon | 1 | 3 | 8 | Amanda Anisimova | 5 | 6 | 7$^7$ |
| 8 | Amanda Anisimova | 6 | 6 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Nicole Gibbs | 6 | 2 | 2 | | | | |
| | Danielle Lao | 3 | 6 | 6 | | | | |
| | Danielle Lao | 3 | 6 | 6 | | Danielle Lao | 6 | 6 |
| | | | | | 6 | Irina Falconi | 1 | 3 |
| | Jacqueline Cako | 2 | 5 | | 6 | Irina Falconi | 1 | 3 |
| 6 | Irina Falconi | 6 | 7 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Magdalena Fręch | 6 | 3 | 6 | | | | | |
| WC | Emiliana Arango | 3 | 6 | 1 | | | | | |
| WC | Emiliana Arango | 3 | 6 | 1 | 4 | Magdalena Fręch | 4 | 6 | 4 |
| | | | | | 5 | Verónica Cepede Royg | 6 | 4 | 6 |
| | Valeria Savinykh | 3 | 6 | 4 | 5 | Verónica Cepede Royg | 6 | 4 | 6 |
| 5 | Verónica Cepede Royg | 6 | 4 | 6 | | | | | |