# 2020 Columbus Challenger – Singles

Peter Polansky was the defending champion but lost in the second round to Strong Kirchheimer.
J. J. Wolf won the title after defeating Denis Istomin 6–4, 6–2 in the final.

## Seeds

All seeds receive a bye into the second round.
* Christopher O'Connell (third round)
* Marc Polmans (quarterfinals)
* Cedrik-Marcel Stebe (quarterfinals)
* Emilio Gómez (third round)
* Denis Istomin (final)
* J. J. Wolf (champion)
* Dudi Sela (second round, retired)
* Mikael Torpegaard (semifinals)
* Ramkumar Ramanathan (second round)
* Peter Polansky (second round)
* Andrew Harris (second round)
* Jason Kubler (second round)
* Jurij Rodionov (semifinals)
* Juan Pablo Ficovich (second round)
* Nam Ji-sung (third round)
* Aleksandar Vukic (quarterfinals)

## 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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 13 | Jurij Rodionov | 7$^7$ | 7$^7$ | | | | | | | | | |
| | Kaichi Uchida | 6$^5$ | 6$^3$ | | | | | | | | | |
| | Kaichi Uchida | 6$^5$ | 6$^3$ | | 13 | Jurij Rodionov | 3 | 6$^1$ | | | | |
| | | | | | 5 | Denis Istomin | 6 | 7$^7$ | | | | |
| 16 | Aleksandar Vukic | 3 | 2 | | 5 | Denis Istomin | 6 | 7$^7$ | | | | |
| 5 | Denis Istomin | 6 | 6 | | | | | | | | | |
| 5 | Denis Istomin | 6 | 6 | | | | | | 5 | Denis Istomin | 4 | 2 |
| | | | | | | | | | 6 | J. J. Wolf | 6 | 6 |
| 6 | J. J. Wolf | 5 | 7$^7$ | 6 | | | | | | | | | 6 | J. J. Wolf | 6 | 6 |
| 3 | Cedrik-Marcel Stebe | 7 | 6$^4$ | 3 | | | | | | | | |
| 3 | Cedrik-Marcel Stebe | 7 | 6$^4$ | 3 | 6 | J. J. Wolf | 7$^7$ | 7$^7$ | | | | |
| | | | | | 8 | Mikael Torpegaard | 6$^2$ | 6$^5$ | | | | |
| 8 | Mikael Torpegaard | 7 | 7$^7$ | | 8 | Mikael Torpegaard | 6$^2$ | 6$^5$ | | | | |
| 2 | Marc Polmans | 5 | 6$^2$ | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | C O'Connell | 6 | 6 | | | | | | | | | | |
| | S Bangoura | 6 | 6 | | | S Bangoura | 4 | 2 | | | | | | | | | | |
| Alt | Austin Rapp | 3 | 3 | | | | | | | 1 | C O'Connell | 7$^7$ | 6$^5$ | 2 | | | | |
| | R Ortega Olmedo | 6$^5$ | 2 | | | | | | | 13 | J Rodionov | 6$^4$ | 7$^7$ | 6 | | | | |
| | D Hidalgo | 7$^7$ | 6 | | | D Hidalgo | 6 | 4 | 4 | | | | | | | | | |
| | | | | | 13 | J Rodionov | 4 | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | | 13 | J Rodionov | 7$^7$ | 7$^7$ |
| | | | | | | | | | | | | | | | | K Uchida | 6$^5$ | 6$^3$ |
| | | | | | 10 | P Polansky | 6 | 1 | 6$^5$ | | | | | | | | | |
| Alt | S Kirchheimer | 4 | 6 | 6 | Alt | S Kirchheimer | 4 | 6 | 7$^7$ | | | | | | | | | |
| | J Hernández-Fernández | 6 | 2 | 3 | | | | | | Alt | S Kirchheimer | 4 | 6 | 6$^4$ | | | | |
| | K Uchida | 6 | 3 | 7$^7$ | | | | | | | K Uchida | 6 | 1 | 7$^7$ | | | | |
| | Evan Song | 3 | 6 | 6$^2$ | | K Uchida | 7 | 1 | | | | | | | | | | |
| | | | | | 7 | D Sela | 5 | 0$^r$ | | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 4 | E Gómez | 6 | 6 | | | | | | | | | | |
| | N Hardt | 6 | 3 | 0 | | R Rodríguez-Pace | 4 | 0 | | | | | | | | | | |
| | R Rodríguez-Pace | 2 | 6 | 6 | | | | | | 4 | E Gómez | 6$^4$ | 6 | 6$^6$ | | | | |
| | Ma Redlicki | 6$^4$ | 3 | | | | | | | 16 | A Vukic | 7$^7$ | 3 | 7$^8$ | | | | |
| | A Escoffier | 7$^7$ | 6 | | | A Escoffier | 3 | 6$^6$ | | | | | | | | | | |
| | | | | | 16 | A Vukic | 6 | 7$^8$ | | | | | | | | | | |
| | | | | | | | | | | | | | | | 16 | A Vukic | 3 | 2 |
| | | | | | | | | | | | | | | | 5 | D Istomin | 6 | 6 |
| | | | | | 12 | J Kubler | 6 | 6$^1$ | 4 | | | | | | | | | |
| WC | J Boulais | 4 | 2 | | | G Clezar | 2 | 7$^7$ | 6 | | | | | | | | | |
| | G Clezar | 6 | 6 | | | | | | | | G Clezar | 3 | 1 | | | | | |
| Alt | A Cozbinov | 6 | 6 | | | | | | | 5 | D Istomin | 6 | 6 | | | | | |
| Q | L Castelnuovo | 3 | 2 | | Alt | A Cozbinov | 2 | 2 | | | | | | | | | | |
| | | | | | 5 | D Istomin | 6 | 6 | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 6 | J. J. Wolf | 6$^5$ | 6 | 6 | | | | | | | | | | |
| | Jordi Arconada | 3 | 6$^6$ | | J Ward | 7$^7$ | 3 | 4 | | | | | | | | | | |
| | J Ward | 6 | 7$^8$ | | | | | | 6 | J. J. Wolf | 6 | 4 | 6 | | | | | |
| WC | J McNally | 6$^3$ | 6$^5$ | | | | | | | R Quiroz | 2 | 6 | 2 | | | | | |
| | R Quiroz | 7$^7$ | 7$^7$ | | R Quiroz | 7$^7$ | 4 | 6 | | | | | | | | | | |
| | | | | 11 | A Harris | 6$^5$ | 6 | 1 | | | | | | | | | | |
| | | | | | | | | | | | | | | 6 | J. J. Wolf | 5 | 7$^7$ | 6 |
| | | | | | | | | | | | | | | 3 | C-M Stebe | 7 | 6$^4$ | 3 |
| | | | | 14 | JP Ficovich | 2 | 6$^5$ | | | | | | | | | | | |
| WC | Alexander Brown | 3 | 6$^5$ | | J Härteis | 6 | 7$^7$ | | | | | | | | | | | |
| | J Härteis | 6 | 7$^7$ | | | | | | | J Härteis | 4 | 1 | | | | | | |
| | M Pecotić | 7$^7$ | 6 | | | | | | 3 | C-M Stebe | 6 | 6 | | | | | | |
| | U Blanch | 6$^4$ | 3 | | M Pecotić | 4 | 6$^7$ | | | | | | | | | | | |
| | | | | 3 | C-M Stebe | 6 | 7$^9$ | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 8 | M Torpegaard | 6$^5$ | 6 | 6 | | | | | | | | | |
| | C Gómez-Herrera | 3 | 3 | | | K King | 7$^7$ | 4 | 4 | | | | | | | | | |
| | K King | 6 | 6 | | | | | | | 8 | M Torpegaard | 7$^7$ | 4 | 6 | | | | |
| | D Young | 5 | 6$^6$ | | | | | | | Q | Z Li | 6$^2$ | 6 | 4 | | | | |
| Q | Z Li | 7 | 7$^8$ | | Q | Z Li | 7$^9$ | 7$^7$ | | | | | | | | | | |
| | | | | | 9 | R Ramanathan | 6$^7$ | 6$^4$ | | | | | | | | | | |
| | | | | | | | | | | | | | | | 8 | M Torpegaard | 7 | 7$^7$ |
| | | | | | | | | | | | | | | | 2 | M Polmans | 5 | 6$^2$ |
| | | | | | 15 | J-s Nam | 6 | 6 | | | | | | | | | | |
| | L Glasspool | 7$^7$ | 6 | | | L Glasspool | 3 | 2 | | | | | | | | | | |
| WC | C Kingsley | 6$^3$ | 3 | | | | | | | 15 | J-s Nam | 3 | 5 | | | | | |
| Alt | R Roelofse | 1 | 7$^9$ | 6$^6$ | | | | | | 2 | M Polmans | 6 | 7 | | | | | |
| | A Kovacevic | 6 | 6$^7$ | 7$^8$ | | A Kovacevic | 6$^6$ | 4 | | | | | | | | | | |
| | | | | | 2 | M Polmans | 7$^8$ | 6 | | | | | | | | | | |