| Singles | |
|---|---|
| 2015 İstanbul Cup | |
| Champion |  Lesia Tsurenko |
| Runner-up |  Urszula Radwańska |
| Score | 7–5, 6–1 |
Caroline Wozniacki was the defending champion, but she chose not to participate this year.
Lesia Tsurenko won the title, defeating Urszula Radwańska in the final 7–5, 6–1.
Venus Williams (first round) Elina Svitolina (first round)
Jelena Janković (first round)
Alizé Cornet (second round)
Camila Giorgi (second round)
Daria Gavrilova (first round) Anastasia Pavlyuchenkova (first round)
Tsvetana Pironkova (quarterfinals)| Semifinals | Final | ||||||||||||
| Lesia Tsurenko | 6 | 6 | |||||||||||
 Kirsten Flipkens | 4 | 2 | |||||||||||
| Lesia Tsurenko | 7 | 6 | |||||||||||
| Urszula Radwańska | 5 | 1 | |||||||||||
| Urszula Radwańska | 6 | 4 | 6 | ||||||||||
 Magdaléna Rybáriková | 3 | 6 | 3 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | V Williams | 4 | 64 | ||||||||||||||||||||||||
| Q | K Bondarenko | 6 | 77 | Q | K Bondarenko | 6 | 4 | 6 | |||||||||||||||||||
| Q | O Savchuk | 3 | 5 |  M Barthel | 3 | 6 | 2 | ||||||||||||||||||||
| M Barthel | 6 | 7 | Q | K Bondarenko | 613 | 5 | |||||||||||||||||||||
| WC |  Ç Büyükakçay | 6 | 3 | 2 | L Tsurenko | 715 | 7 | ||||||||||||||||||||
| D Hantuchová | 4 | 6 | 6 | D Hantuchová | 1 | 1 | |||||||||||||||||||||
| L Tsurenko | 77 | 3 | 6 | L Tsurenko | 6 | 6 | |||||||||||||||||||||
| 6 | D Gavrilova | 62 | 6 | 3 | L Tsurenko | 6 | 6 | ||||||||||||||||||||
| 4/WC | A Cornet | 6 | 7 | K Flipkens | 4 | 2 | |||||||||||||||||||||
| Y Wickmayer | 3 | 5 | 4/WC | A Cornet | 6 | 1 | 2 | ||||||||||||||||||||
| Q |  J Ostapenko | 2 | 0 | K Flipkens | 2 | 6 | 6 | ||||||||||||||||||||
| K Flipkens | 6 | 6 | K Flipkens | 6 | 6 | ||||||||||||||||||||||
| F Schiavone | 6 | 6 | F Schiavone | 2 | 4 | ||||||||||||||||||||||
| S Karatantcheva | 0 | 1 | F Schiavone | 6 | 78 | ||||||||||||||||||||||
| D Cibulková | 5 | 7 | 64 | 5 | C Giorgi | 4 | 66 | ||||||||||||||||||||
| 5 | C Giorgi | 7 | 5 | 77 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | T Pironkova | 0 | 77 | 77 | |||||||||||||||||||||||
| Q | M Gasparyan | 6 | 64 | 63 | 8 | T Pironkova | 6 | 1 | 6 | ||||||||||||||||||
 K Nara | 6 | 79 | K Nara | 3 | 6 | 1 | |||||||||||||||||||||
| V Diatchenko | 4 | 67 | 8 | T Pironkova | 2 | 6 | 65 | ||||||||||||||||||||
 Y Shvedova | 7 | 3 | 4 | U Radwańska | 6 | 3 | 77 | ||||||||||||||||||||
| B Jovanovski | 5 | 6 | 6 | B Jovanovski | 3 | 2 | |||||||||||||||||||||
| U Radwańska | 6 | 3 | 6 | U Radwańska | 6 | 6 | |||||||||||||||||||||
| 3 | J Janković | 4 | 6 | 2 | U Radwańska | 6 | 4 | 6 | |||||||||||||||||||
| 7 | A Pavlyuchenkova | 2 | 1 | M Rybáriková | 3 | 6 | 3 | ||||||||||||||||||||
| R Vinci | 6 | 6 | R Vinci | 77 | 6 | ||||||||||||||||||||||
| Q | A Panova | 6 | 2 | 6 | Q | A Panova | 63 | 3 | |||||||||||||||||||
| E Kulichkova | 4 | 6 | 1 | R Vinci | 6 | 5 | 2 | ||||||||||||||||||||
| Q | A Tatishvili | 7 | 5 | 0r | M Rybáriková | 0 | 7 | 6 | |||||||||||||||||||
| WC | İ Soylu | 5 | 7 | 2 | WC | İ Soylu | 0 | 0 | |||||||||||||||||||
| M Rybáriková | 6 | 6 | M Rybáriková | 6 | 6 | ||||||||||||||||||||||
| 2 | E Svitolina | 1 | 3 | ||||||||||||||||||||||||
Elizaveta Kulichkova (moved to main draw)
Kristýna Plíšková (first round) Margarita Gasparyan (qualified) Kateryna Bondarenko (qualified)
Zhu Lin (qualifying competition) Jeļena Ostapenko (qualified) Anna Tatishvili (qualified) Alexandra Panova (qualified) Misa Eguchi (first round) Andrea Hlaváčková (qualifying competition)
Anett Kontaveit (first round) Yang Zhaoxuan (first round) Yuliya Beygelzimer (first round)| First round | Qualifying competition | ||||||||||||
| 13 | Yuliya Beygelzimer | 1 | 6 | 4 | |||||||||
| WC | Berfu Cengiz | 6 | 3 | 6 | |||||||||
| WC | Berfu Cengiz | 1 | 3 | ||||||||||
| 8 | Alexandra Panova | 6 | 6 | ||||||||||
| Alberta Brianti | 3 | 78 | 2 | ||||||||||
| 8 | Alexandra Panova | 6 | 66 | 6 | |||||||||
| First round | Qualifying competition | ||||||||||||
| 2 | Kristýna Plíšková | 3 | 6 | 4 | |||||||||
| WC |  Sara Tomic | 6 | 4 | 6 | |||||||||
| WC | Sara Tomic | 6 | 3 | 3 | |||||||||
| Alt | Olga Savchuk | 3 | 6 | 6 | |||||||||
| Alt | Olga Savchuk | 6 | 6 | ||||||||||
| 12 | Yang Zhaoxuan | 3 | 3 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 3 | Margarita Gasparyan | 6 | 6 | ||||||||||
 Tereza Mrdeža | 1 | 3 | |||||||||||
| 3 | Margarita Gasparyan | 7 | 6 | ||||||||||
| 10 | Andrea Hlaváčková | 5 | 1 | ||||||||||
| WC | Ayla Aksu | 77 | 4 | 61 | |||||||||
| 10 | Andrea Hlaváčková | 61 | 6 | 77 | |||||||||
| First round | Qualifying competition | ||||||||||||
| 4 | Kateryna Bondarenko | 6 | 6 | ||||||||||
| Hiroko Kuwata | 3 | 2 | |||||||||||
| 4 | Kateryna Bondarenko | 3 | 6 | 6 | |||||||||
| Nastassja Burnett | 6 | 3 | 0 | ||||||||||
| Nastassja Burnett | 3 | 6 | 6 | ||||||||||
| 9 | Misa Eguchi | 6 | 1 | 0 | |||||||||
| First round | Qualifying competition | ||||||||||||
| 5 | Zhu Lin | 6 | 6 | ||||||||||
 Akgul Amanmuradova | 1 | 0 | |||||||||||
| 5 | Zhu Lin | 2 | 2 | ||||||||||
| 7 | Anna Tatishvili | 6 | 6 | ||||||||||
| Grace Min | 3 | 2 | |||||||||||
| 7 | Anna Tatishvili | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 6 | Jeļena Ostapenko | 2 | |||||||||||
| Nadiia Kichenok | 0r | ||||||||||||
| 6 | Jeļena Ostapenko | 6 | 6 | ||||||||||
| WC | Melis Sezer | 2 | 2 | ||||||||||
| WC | Melis Sezer | 4 | 6 | 6 | |||||||||
| 11 | Anett Kontaveit | 6 | 1 | 3 | |||||||||
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