# 2018 Columbus Challenger – Singles

Ante Pavić was the defending champion but chose not to defend his title.
Michael Mmoh won the title after defeating Jordan Thompson 6–3, 7–6$^{(7–4)}$ in the final.

## Seeds

* Jordan Thompson (final)
* Peter Polansky (second round)
* Michael Mmoh (champion)
* Reilly Opelka (withdrew)
* Dominik Köpfer (quarterfinals)
* Alexei Popyrin (quarterfinals)
* Roberto Quiroz (semifinals)
* Maverick Banes (first 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 | Jordan Thompson | 5 | 7$^7$ | 7$^7$ | | | | |
| 7 | Roberto Quiroz | 7 | 6$^4$ | 6$^4$ | | | | |
| 7 | Roberto Quiroz | 7 | 6$^4$ | 6$^4$ | 1 | Jordan Thompson | 3 | 6$^4$ |
| | | | | | 3 | Michael Mmoh | 6 | 7$^7$ |
| 3 | Michael Mmoh | 7 | 6 | | 3 | Michael Mmoh | 6 | 7$^7$ |
| WC | Mikael Torpegaard | 5 | 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 | J Thompson | 6 | 7 | | | | | | | | | | | | | | | | |
| Q | Evan Song | 0 | 5 | | 1 | J Thompson | 6 | 7$^7$ | | | | | | | | | | | |
| | R Cid Subervi | 6$^4$ | 6$^3$ | | | K Uchida | 1 | 6$^2$ | | | | | | | | | | | |
| | K Uchida | 7$^7$ | 7$^7$ | | | | | | | 1 | J Thompson | 4 | 6 | 6 | | | | | |
| Q | R Shane | 6$^5$ | 5 | | | | | | | 5 | D Köpfer | 6 | 1 | 3 | | | | | |
| WC | J McNally | 7$^7$ | 7 | | WC | J McNally | 4 | 6 | 4 | | | | | | | | | | |
| LL | D Pérez Sanz | 1 | 0 | | 5 | D Köpfer | 6 | 4 | 6 | | | | | | | | | | |
| 5 | D Köpfer | 6 | 6 | | | | | | | | | | | | 1 | J Thompson | 5 | 7$^7$ | 7$^7$ |
| Q | L Saville | 7 | 6 | | | | | | | | | | | | 7 | R Quiroz | 7 | 6$^4$ | 6$^4$ |
| | A González | 5 | 4 | | Q | L Saville | 6 | 2 | 7 | | | | | | | | | | |
| | J Hernández-Fernández | 6 | 6 | | | J Hernández-Fernández | 4 | 6 | 5 | | | | | | | | | | |
| | A Harris | 4 | 1 | | | | | | | Q | L Saville | 3 | 1 | | | | | | |
| | T Paul | 6 | 6 | | | | | | | 7 | R Quiroz | 6 | 6 | | | | | | |
| | E King | 3 | 4 | | | T Paul | 6$^4$ | 6 | 6$^6$ | | | | | | | | | | |
| | J-P Smith | 6 | 6$^4$ | 6$^7$ | 7 | R Quiroz | 7$^7$ | 3 | 7$^8$ | | | | | | | | | | |
| 7 | R Quiroz | 3 | 7$^7$ | 7$^9$ | | | | | | | | | | | | | | | |

### 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 |
| 6 | A Popyrin | 4 | 7$^7$ | 7 | | | | | | | | | | | | | |
| | R Ortega Olmedo | 6 | 6$^3$ | 5 | 6 | A Popyrin | 6 | 7 | | | | | | | | | |
| | S Diez | 6 | 6 | | | S Diez | 3 | 5 | | | | | | | | | |
| | M Giron | 3 | 4 | | | | | | | 6 | A Popyrin | 4 | 3 | | | | |
| SE | J Duckworth | 7$^9$ | 6$^6$ | 3 | | | | | | 3 | M Mmoh | 6 | 6 | | | | |
| | E Gómez | 6$^7$ | 7$^8$ | 6 | | E Gómez | 3 | 2 | | | | | | | | | |
| | S Bangoura | 6 | 1 | 2 | 3 | M Mmoh | 6 | 6 | | | | | | | | | |
| 3 | M Mmoh | 3 | 6 | 6 | | | | | | | | | | 3 | M Mmoh | 7 | 6 |
| 8 | M Banes | 6$^3$ | 4 | | | | | | | | | | | WC | M Torpegaard | 5 | 3 |
| WC | M Torpegaard | 7$^7$ | 6 | | WC | M Torpegaard | 6 | 6 | | | | | | | | | |
| WC | J. J. Wolf | 7 | 6 | | WC | J. J. Wolf | 1 | 4 | | | | | | | | | |
| | J Choinski | 5 | 4 | | | | | | | WC | M Torpegaard | 6 | 6 | | | | |
| | V Millot | 2 | 4 | | | | | | | Q | T-S Kwiatkowski | 4 | 2 | | | | |
| Q | T-S Kwiatkowski | 6 | 6 | | Q | T-S Kwiatkowski | 7$^7$ | 2 | 7$^9$ | | | | | | | | |
| WC | Martin Joyce | 3 | 7$^{13}$ | 1 | 2 | P Polansky | 6$^5$ | 6 | 6$^7$ | | | | | | | | |
| 2 | P Polansky | 6 | 6$^{11}$ | 6 | | | | | | | | | | | | | |