# 2018 RBC Pro Challenge – Singles

Kristie Ahn was the defending champion, but retired in the first round against Kurumi Nara.
Whitney Osuigwe won the title, defeating Beatriz Haddad Maia in the final, 6–3, 6–4.

## Seeds

* Belinda Bencic (semifinals)
* Madison Brengle (second round)
* Fanny Stollár (first round)
* Jessica Pegula (first round)
* Claire Liu (second round)
* Nicole Gibbs (second round)
* Kristie Ahn (first round, retired)
* Christina McHale (second round)

## 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 | Belinda Bencic | 4 | 6 | 6$^3$ | | | | |
| JE | Whitney Osuigwe | 6 | 2 | 7$^7$ | | | | |
| JE | Whitney Osuigwe | 6 | 2 | 7$^7$ | JE | Whitney Osuigwe | 6 | 6 |
| | | | | | | Beatriz Haddad Maia | 3 | 4 |
| | Beatriz Haddad Maia | 6 | 6 | | | Beatriz Haddad Maia | 3 | 4 |
| | Danielle Lao | 2 | 3 | | | | | |

### 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 | Semifinals |
| 1 | B Bencic | 6 | 6 | | | | | | | | | | | | | | | | |
| | U Eikeri | 1 | 2 | | 1 | B Bencic | 6 | 7 | | | | | | | | | | | |
| | V Lepchenko | 6 | 4 | 6 | | V Lepchenko | 2 | 5 | | | | | | | | | | | |
| | V Flink | 3 | 6 | 4 | | | | | | 1 | B Bencic | 4 | 6 | 6 | | | | | |
| Q | A Li | 2 | 5 | | | | | | | | K Day | 6 | 2 | 2 | | | | | |
| | K Day | 6 | 7 | | | K Day | 6 | 7$^7$ | | | | | | | | | | | |
| PR | E Halbauer | 6 | 5 | 3 | 8/WC | C McHale | 4 | 6$^3$ | | | | | | | | | | | |
| 8/WC | C McHale | 3 | 7 | 6 | | | | | | | | | | | 1 | B Bencic | 4 | 6 | 6$^3$ |
| 3 | F Stollár | 4 | 6 | 3 | | | | | | | | | | | JE | W Osuigwe | 6 | 2 | 7$^7$ |
| PR | N Podoroska | 6 | 4 | 6 | PR | N Podoroska | 2 | 1 | | | | | | | | | | | |
| | V Cepede Royg | 0 | 2 | | WC | C McNally | 6 | 6 | | | | | | | | | | | |
| WC | C McNally | 6 | 6 | | | | | | | WC | C McNally | 7 | 6$^3$ | 3 | | | | | |
| JE | W Osuigwe | 6 | 5 | 6 | | | | | | JE | W Osuigwe | 5 | 7$^7$ | 6 | | | | | |
| WC | S Chang | 2 | 7 | 3 | JE | W Osuigwe | 6$^4$ | 6 | 6 | | | | | | | | | | |
| | K Nara | 6 | 0 | | | K Nara | 7$^7$ | 3 | 2 | | | | | | | | | | |
| 7 | K Ahn | 2 | 0$^r$ | | | | | | | | | | | | | | | | |

### 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 |
| 5 | C Liu | 6 | 3 | 6 | | | | | | | | | | | | |
| Q | B Turati | 2 | 6 | 3 | 5 | C Liu | 4 | 3 | | | | | | | | |
| | S Karatantcheva | 6 | 6 | | | S Karatantcheva | 6 | 6 | | | | | | | | |
| | A Kiick | 1 | 2 | | | | | | | S Karatantcheva | 1 | 6 | 5 | | | |
| | G Brodsky | 6 | 5 | 3 | | | | | | B Haddad Maia | 6 | 3 | 7 | | | |
| | B Haddad Maia | 1 | 7 | 6 | | B Haddad Maia | 7$^7$ | 6 | | | | | | | | |
| WC | L Chirico | 7$^7$ | 6 | | WC | L Chirico | 6$^3$ | 4 | | | | | | | | |
| 4 | J Pegula | 6$^4$ | 0 | | | | | | | | | | | B Haddad Maia | 6 | 6 |
| 6 | N Gibbs | 6 | 4 | 6 | | | | | | | | | | D Lao | 2 | 3 |
| | A Muhammad | 3 | 6 | 3 | 6 | N Gibbs | 2 | 3 | | | | | | | | |
| | D Lao | 6 | 7$^7$ | | | D Lao | 6 | 6 | | | | | | | | |
| | G Min | 1 | 6$^3$ | | | | | | | D Lao | 6 | 7 | | | | |
| Q | E Douglas | 5 | 6 | 4 | | | | | | L Davis | 1 | 5 | | | | |
| | L Davis | 7 | 4 | 6 | | L Davis | 3 | 6 | 6 | | | | | | | |
| Q | Q Gleason | 6 | 1 | 0 | 2 | M Brengle | 6 | 4 | 4 | | | | | | | |
| 2 | M Brengle | 4 | 6 | 6 | | | | | | | | | | | | |