# 2005 İstanbul Cup – Singles

This was the first time a WTA level was held in Istanbul.Top seed Venus Williams won the title, defeating Nicole Vaidišová in the final, 6–3, 6–2.

## Seeds

The top two seeds received a bye into the second round.
* Venus Williams (champion)
* Nicole Vaidišová (final)
* Anna Smashnova (semifinals)
* Lisa Raymond (first round)
* Anna-Lena Grönefeld (quarterfinals)
* Meghann Shaughnessy (first round)
* Anna Chakvetadze (quarterfinals)
* Mashona Washington (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 |
| 1 | Venus Williams | 6 | 6 | | | | | |
| Q | Tsvetana Pironkova | 1 | 3 | | | | | |
| Q | Tsvetana Pironkova | 1 | 3 | | 1 | Venus Williams | 6 | 6 |
| | | | | | 2 | Nicole Vaidišová | 3 | 2 |
| 3 | Anna Smashnova | 6 | 1 | 0 | 2 | Nicole Vaidišová | 3 | 2 |
| 2 | Nicole Vaidišová | 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 |
| | | | | | 1 | V Williams | 6 | 6 | | | | | | | | | |
| | M Marrero | 6 | 6 | | | M Marrero | 0 | 0 | | | | | | | | | |
| | S Hisamatsu | 0 | 2 | | | | | | | 1 | V Williams | 6 | 6 | | | | |
| | T Panova | 6 | 5 | 6 | | | | | | 7 | A Chakvetadze | 2 | 1 | | | | |
| | J Craybas | 4 | 7 | 4 | | T Panova | 7 | 4 | 1 | | | | | | | | |
| | An Serra Zanetti | 5 | 2 | | 7 | A Chakvetadze | 5 | 6 | 6 | | | | | | | | |
| 7 | A Chakvetadze | 7 | 6 | | | | | | | | | | | 1 | V Williams | 6 | 6 |
| 4 | L Raymond | 1 | 2 | | | | | | | | | | | Q | T Pironkova | 1 | 3 |
| | A Morigami | 6 | 6 | | | A Morgami | 6 | 4 | 2 | | | | | | | | |
| LL | K Bondarenko | 2 | 2 | | | S Pe'er | 3 | 6 | 6 | | | | | | | | |
| | S Pe'er | 6 | 6 | | | | | | | | S Pe'er | 3 | 6$^4$ | | | | |
| | M Irvin | 6 | 2 | 5 | | | | | | Q | T Pironkova | 6 | 7$^7$ | | | | |
| | Y Fedak | 4 | 6 | 7 | | Y Fedak | 6 | 4 | 4 | | | | | | | | |
| Q | T Pironkova | 6 | 7 | | Q | T Pironkova | 3 | 6 | 6 | | | | | | | | |
| 6 | M Shaughnessy | 3 | 5 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | M Washington | 6 | 2 | 7 | | | | | | | | | | | | | |
| | A Bondarenko | 4 | 6 | 5 | 8 | M Washington | 7 | 6 | | | | | | | | | |
| Q | E Vesnina | 6 | 6 | | Q | E Vesnina | 5 | 1 | | | | | | | | | |
| WC | Ç Büyükakçay | 1 | 2 | | | | | | 8 | M Washington | 3 | 1 | | | | | |
| | J Hopkins | 4 | 6 | 6 | | | | | 3 | A Smashnova | 6 | 6 | | | | | |
| | M Matevžič | 6 | 0 | 1 | | J Hopkins | 1 | 0 | | | | | | | | | |
| | C Castaño | 3 | 6 | 2 | 3 | A Smashnova | 6 | 6 | | | | | | | | | |
| 3 | A Smashnova | 6 | 2 | 6 | | | | | | | | | 3 | A Smashnova | 6 | 1 | 0 |
| 5 | A-L Grönefeld | 6 | 7 | | | | | | | | | | 2 | N Vaidišová | 4 | 6 | 6 |
| | M Díaz Oliva | 3 | 5 | | 5 | A-L Grönefeld | 6 | 6 | | | | | | | | | |
| Q | L Stančiūtė | 4 | 7$^7$ | 3 | | E Gagliardi | 3 | 2 | | | | | | | | | |
| | E Gagliardi | 6 | 6$^5$ | 6 | | | | | 5 | A-L Grönefeld | 5 | 6$^6$ | | | | | |
| WC | P Özgen | 3 | 0 | | | | | | 2 | N Vaidišová | 7 | 7$^8$ | | | | | |
| Q | I Abramović | 6 | 6 | | Q | I Abramović | 2 | 3 | | | | | | | | | |
| | | | | | 2 | N Vaidišová | 6 | 6 | | | | | | | | | |