# 2013 Open GDF Suez Nantes Atlantique – Singles

Monica Niculescu was the defending champion, having won the event in 2012, but withdrew before the event started.
Aliaksandra Sasnovich won the tournament, defeating Magda Linette in the final, 4–6, 6–4, 6–2.

## Seeds

* Monica Niculescu (withdrew)
* Camila Giorgi (withdrew)
* Yulia Putintseva (first round)
* Lara Arruabarrena (quarterfinals)
* Nadiya Kichenok (semifinals)
* Claire Feuerstein (semifinals)
* Sesil Karatantcheva (first round)
* Sofia Arvidsson (first round)
* Stéphanie Foretz Gacon (quarterfinals)
* Alexandra Dulgheru (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 | Final | Final | Final | Final |
| 5 | Nadiya Kichenok | 3 | 1 | | | | |
| | Aliaksandra Sasnovich | 6 | 6 | | | | |
| | Aliaksandra Sasnovich | 6 | 6 | Aliaksandra Sasnovich | 4 | 6 | 6 |
| | | | | Magda Linette | 6 | 4 | 2 |
| | Magda Linette | 6 | 6 | Magda Linette | 6 | 4 | 2 |
| 6 | Claire Feuerstein | 2 | 2 | | | | |

### 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 |
| 10 | A Dulgheru | 3 | 5 | | | | | | | | | | | | | | |
| LL | Y Neuwirth | 6 | 7 | | LL | Y Neuwirth | 6$^8$ | 2 | | | | | | | | | |
| Q | F Gervais | 4 | 3 | | | A Hesse | 7$^{10}$ | 6 | | | | | | | | | |
| | A Hesse | 6 | 6 | | | | | | | | A Hesse | 4 | 2 | | | | |
| | M Georges | 0 | 4 | | | | | | | 5 | N Kichenok | 6 | 6 | | | | |
| | PC Gonçalves | 6 | 6 | | | PC Gonçalves | 6$^4$ | 1 | | | | | | | | | |
| | V Golubic | 2 | 6 | 2 | 5 | N Kichenok | 7$^7$ | 6 | | | | | | | | | |
| 5 | N Kichenok | 6 | 1 | 6 | | | | | | | | | | 5 | N Kichenok | 3 | 1 |
| 4 | L Arruabarrena | 6 | 6 | | | | | | | | | | | | A Sasnovich | 6 | 6 |
| LL | M Chakhnashvili | 3 | 1 | | 4 | L Arruabarrena | 6 | 4 | 6 | | | | | | | | |
| LL | T Mirčić | 3 | 6$^3$ | | WC | M Krajicek | 3 | 6 | 4 | | | | | | | | |
| WC | M Krajicek | 6 | 7$^7$ | | | | | | | 4 | L Arruabarrena | 1 | 1 | | | | |
| WC | L Jeanjean | 1 | 1 | | | | | | | | A Sasnovich | 6 | 6 | | | | |
| | A Sasnovich | 6 | 6 | | | A Sasnovich | 6 | 6 | | | | | | | | | |
| | L Kichenok | 4 | 7 | 6 | | L Kichenok | 4 | 2 | | | | | | | | | |
| 7 | S Karatantcheva | 6 | 5 | 2 | | | | | | | | | | | | | |

### 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 | S Arvidsson | 7 | 4 | 4 | | | | | | | | | | | | | |
| | M Linette | 5 | 6 | 6 | | M Linette | 6 | 6 | | | | | | | | | |
| | R Hogenkamp | 6 | 6 | | | R Hogenkamp | 3 | 2 | | | | | | | | | |
| | D Seguel | 3 | 2 | | | | | | | | M Linette | 6 | 6 | | | | |
| Q | N Melichar | 7 | 6 | | | | | | | WC | K Laisné | 4 | 2 | | | | |
| LL | C Shakovets | 5 | 4 | | Q | N Melichar | 6 | 2 | 2 | | | | | | | | |
| WC | K Laisné | 6 | 6 | | WC | K Laisné | 2 | 6 | 6 | | | | | | | | |
| 3 | Y Putintseva | 2 | 3 | | | | | | | | | | | | M Linette | 6 | 6 |
| 6 | C Feuerstein | 6 | 6 | | | | | | | | | | | 6 | C Feuerstein | 2 | 2 |
| | V Savinykh | 1 | 2 | | 6 | C Feuerstein | 6 | 6 | | | | | | | | | |
| Q | F Ferro | 6 | 6$^2$ | 6 | Q | F Ferro | 1 | 0 | | | | | | | | | |
| Q | N Orlova | 1 | 7$^7$ | 1 | | | | | | 6 | C Feuerstein | 6 | 6 | | | | |
| | P Parmentier | 4 | 4 | | | | | | | 9 | S Foretz Gacon | 4 | 1 | | | | |
| | L Hradecká | 6 | 6 | | | L Hradecká | 6$^4$ | 7$^7$ | 1 | | | | | | | | |
| WC | A Albié | 3 | 2 | | 9 | S Foretz Gacon | 7$^7$ | 6$^3$ | 6 | | | | | | | | |
| 9 | S Foretz Gacon | 6 | 6 | | | | | | | | | | | | | | |