# 2018 Challenger Banque Nationale de Granby – Women's singles

Cristiana Ferrando was the defending champion, but lost in the first round to Maria Sanchez.
Julia Glushko won the title after defeating Arina Rodionova 6–4, 6–3 in the final.

## Seeds

* Arina Rodionova (final)
* Marie Bouzková (second round)
* Bianca Andreescu (semifinals, withdrew)
* Francesca Di Lorenzo (second round)
* Julia Glushko (champion)
* Ellen Perez (quarterfinals)
* Maria Sanchez (second round)
* Katherine Sebov (semifinals)

## 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 |
| 1 | Arina Rodionova | 6 | 6 | | | | |
| 8 | Katherine Sebov | 2 | 0 | | | | |
| 8 | Katherine Sebov | 2 | 0 | 1 | Arina Rodionova | 4 | 3 |
| | | | | 5 | Julia Glushko | 6 | 6 |
| 3 | Bianca Andreescu | | | 5 | Julia Glushko | 6 | 6 |
| 5 | Julia Glushko | w/o | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | Ar Rodionova | 6 | 7$^7$ | | | | | | | | | | | | | | | |
| | H Kaji | 4 | 6$^4$ | | 1 | Ar Rodionova | 6 | 6 | | | | | | | | | | |
| | A Sharma | 7$^7$ | 6 | | | A Sharma | 4 | 1 | | | | | | | | | | |
| | S Akita | 6$^5$ | 1 | | | | | | | 1 | Ar Rodionova | 6 | 6$^5$ | 7 | | | | |
| | M Arcangioli | 3 | 3 | | | | | | | | R Marino | 4 | 7$^7$ | 5 | | | | |
| | R Marino | 6 | 6 | | | R Marino | 4 | 6 | 6 | | | | | | | | | |
| | C Ferrando | 2 | 5 | | 7 | M Sanchez | 6 | 4 | 1 | | | | | | | | | |
| 7 | M Sanchez | 6 | 7 | | | | | | | | | | | | 1 | Ar Rodionova | 6 | 6 |
| 4 | F Di Lorenzo | 6 | 0 | 6 | | | | | | | | | | | 8 | K Sebov | 2 | 0 |
| Q | F Christie | 4 | 6 | 3 | 4 | F Di Lorenzo | 2 | 2 | | | | | | | | | | |
| | UM Arconada | 6 | 3 | 6 | | UM Arconada | 6 | 6 | | | | | | | | | | |
| Q | N Hanatani | 3 | 6 | 1 | | | | | | | UM Arconada | 0 | 1 | | | | | |
| WC | I Boulais | 1 | 2 | | | | | | | 8 | K Sebov | 6 | 6 | | | | | |
| | O Tjandramulia | 6 | 6 | | | O Tjandramulia | 1 | 2 | | | | | | | | | | |
| WC | T Lagarde | 3 | 4 | | 8 | K Sebov | 6 | 6 | | | | | | | | | | |
| 8 | K Sebov | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 6 | E Perez | 6 | 6 | | | | | | | | | | | | | | |
| WC | J Bui | 4 | 3 | | 6 | E Perez | 7 | 6 | | | | | | | | | |
| | R Anderson | 6 | 4 | 6 | | R Anderson | 5 | 4 | | | | | | | | | |
| | M Zacarías | 4 | 6 | 2 | | | | | | 6 | E Perez | 7 | 4 | 5 | | | |
| | C-y Hsu | 6 | 4 | 6$^4$ | | | | | | 3 | B Andreescu | 5 | 6 | 7 | | | |
| WC | LA Fernandez | 3 | 6 | 7$^7$ | WC | LA Fernandez | 1 | 4 | | | | | | | | | |
| | G Brescia | 2 | 6$^7$ | | 3 | B Andreescu | 6 | 6 | | | | | | | | | |
| 3 | B Andreescu | 6 | 7$^9$ | | | | | | | | | | | | 3 | B Andreescu | |
| 5 | J Glushko | 7$^7$ | 4 | 6 | | | | | | | | | | | 5 | J Glushko | w/o |
| Q | S Murray | 6$^4$ | 6 | 4 | 5 | J Glushko | 6 | 6 | | | | | | | | | |
| | N Kolar | 2 | 1 | | | E Sema | 4 | 3 | | | | | | | | | |
| | E Sema | 6 | 6 | | | | | | | 5 | J Glushko | 7$^8$ | 6 | | | | |
| | M Mateas | 4 | 6 | 3 | | | | | | Q | A Omae | 6$^6$ | 3 | | | | |
| Q | A Omae | 6 | 3 | 6 | Q | A Omae | 3 | 6 | 7$^8$ | | | | | | | | |
| | V Rodríguez | 3 | 1 | | 2 | M Bouzková | 6 | 3 | 6$^6$ | | | | | | | | |
| 2 | M Bouzková | 6 | 6 | | | | | | | | | | | | | | |