# 2015 Engie Open Nantes Atlantique – Singles

Kateřina Siniaková was the defending champion, but lost to Mathilde Johansson in the semifinals.
Johansson won the title, defeating Andreea Mitu in the final, 6–3, 6–4.

## Seeds

* Anna-Lena Friedsam (quarterfinals)
* Kateřina Siniaková (semifinals)
* Andreea Mitu (final)
* Anastasija Sevastova (second round)
* Kristýna Plíšková (first round)
* Louisa Chirico (semifinals)
* Pauline Parmentier (second round)
* Alexandra Panova (first round)

## Main 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 |
| 6 | Louisa Chirico | 6 | 0 | 4 | | | | |
| 3 | Andreea Mitu | 2 | 6 | 6 | | | | |
| 3 | Andreea Mitu | 2 | 6 | 6 | 3 | Andreea Mitu | 3 | 4 |
| | | | | | | Mathilde Johansson | 6 | 6 |
| | Mathilde Johansson | 6 | 4 | 6 | | Mathilde Johansson | 6 | 6 |
| 2 | Kateřina Siniaková | 4 | 6 | 2 | | | | |

### Top 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 | Semifinals |
| 1 | A-L Friedsam | 7 | 6 | | | | | | | | | | | | | | | |
| | İ Soylu | 5 | 4 | | 1 | A-L Friedsam | 6 | 6 | | | | | | | | | | |
| WC | F Ferro | 5 | 4 | | Q | S Shapatava | 4 | 3 | | | | | | | | | | |
| Q | S Shapatava | 7 | 6 | | | | | | 1 | A-L Friedsam | 6 | 3 | 2 | | | | | |
| WC | T Andrianjafitrimo | 5 | 7$^7$ | 6 | | | | | 6 | L Chirico | 2 | 6 | 6 | | | | | |
| JE | J Teichmann | 7 | 6$^4$ | 2 | WC | T Andrianjafitrimo | 2 | 3 | | | | | | | | | | |
| LL | C Feuerstein | 1 | 3 | | 6 | L Chirico | 6 | 6 | | | | | | | | | | |
| 6 | L Chirico | 6 | 6 | | | | | | | | | | | 6 | L Chirico | 6 | 0 | 4 |
| 3 | A Mitu | 6 | 6 | | | | | | | | | | | 3 | A Mitu | 2 | 6 | 6 |
| | O Dodin | 3 | 2 | | 3 | A Mitu | 6 | 6 | | | | | | | | | | |
| | A Vrljić | 6 | 6 | | | A Vrljić | 3 | 4 | | | | | | | | | | |
| WC | I Ramialison | 4 | 4 | | | | | | 3 | A Mitu | 6 | 7$^{13}$ | | | | | | |
| | T Paszek | 6 | 6 | | | | | | | T Paszek | 2 | 6$^{11}$ | | | | | | |
| Q | K Stuchlá | 4 | 3 | | | T Paszek | 6 | 6 | | | | | | | | | | |
| | M Georges | 6$^6$ | 6 | 6 | | M Georges | 4 | 2 | | | | | | | | | | |
| 8 | A Panova | 7$^8$ | 1 | 1 | | | | | | | | | | | | | | |

### 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 |
| 7 | P Parmentier | 6 | 1 | 6 | | | | | | | | | | | | | | |
| | S Foretz | 1 | 6 | 2 | 7 | P Parmentier | 2 | 4 | | | | | | | | | | |
| | M Johansson | 7$^7$ | 6 | | | M Johansson | 6 | 6 | | | | | | | | | | |
| | N Abduraimova | 6$^5$ | 1 | | | | | | | | M Johansson | 6 | 7$^7$ | | | | | |
| | S Soler Espinosa | 0 | 3 | | | | | | | | A Kalinina | 1 | 6$^3$ | | | | | |
| | A Kalinina | 6 | 6 | | | A Kalinina | 6 | 6 | | | | | | | | | | |
| | R Voráčová | 2 | 3 | | 4 | A Sevastova | 4 | 2 | | | | | | | | | | |
| 4 | A Sevastova | 6 | 6 | | | | | | | | | | | | M Johansson | 6 | 4 | 6 |
| 5 | Kr Plíšková | 4 | 5 | | | | | | | | | | | 2 | K Siniaková | 4 | 6 | 2 |
| | Y Beygelzimer | 6 | 7 | | | Y Beygelzimer | 5 | 2 | | | | | | | | | | |
| Q | X Knoll | 6 | 6 | | Q | X Knoll | 7 | 6 | | | | | | | | | | |
| Q | C Paquet | 4 | 3 | | | | | | | Q | X Knoll | 6$^6$ | 4 | | | | | |
| WC | J Ponchet | 1 | 1 | | | | | | | 2 | K Siniaková | 7$^8$ | 6 | | | | | |
| | T Martincová | 6 | 6 | | | T Martincová | 5 | 6 | 6$^8$ | | | | | | | | | |
| | P Leykina | 6$^5$ | 1 | | 2 | K Siniaková | 7 | 4 | 7$^{10}$ | | | | | | | | | |
| 2 | K Siniaková | 7$^7$ | 6 | | | | | | | | | | | | | | | |