# 2018 JSM Challenger of Champaign–Urbana – Singles

Tim Smyczek was the defending champion but chose not to defend his title.
Reilly Opelka won the title after defeating Ryan Shane 7–6$^{(8–6)}$, 6–3 in the final.

## Seeds

* Marcel Granollers (second round)
* Ugo Humbert (first round)
* Peter Polansky (second round)
* Reilly Opelka (champion)
* Henri Laaksonen (first round, retired)
* Nikola Milojević (first round)
* Christopher Eubanks (quarterfinals)
* John-Patrick Smith (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

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| Q | Ryan Shane | 6 | 6 | | | | | |
| | Blaž Rola | 4 | 3 | | | | | |
| | Blaž Rola | 4 | 3 | | Q | Ryan Shane | 6$^6$ | 3 |
| | | | | | 4 | Reilly Opelka | 7$^8$ | 6 |
| 4 | Reilly Opelka | 2 | 6 | 6 | 4 | Reilly Opelka | 7$^8$ | 6 |
| | Tommy Paul | 6 | 4 | 4 | | | | |

### 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 |
| 1 | M Granollers | 6 | 6 | | | | | | | | | | | | | | |
| Alt | A Ritschard | 1 | 1 | | 1 | M Granollers | 3 | 4 | | | | | | | | | |
| Q | R Shane | 6 | 6 | | Q | R Shane | 6 | 6 | | | | | | | | | |
| Q | Keenan Mayo | 3 | 4 | | | | | | | Q | R Shane | 7 | 6 | | | | |
| WC | Ezekiel Clark | 3 | 6 | 3 | | | | | | 8 | J-P Smith | 5 | 1 | | | | |
| | T Garanganga | 6 | 0 | 6 | | T Garanganga | 3 | 4 | | | | | | | | | |
| | D Yevseyev | 3 | 6$^1$ | | 8 | J-P Smith | 6 | 6 | | | | | | | | | |
| 8 | J-P Smith | 6 | 7$^7$ | | | | | | | | | | | Q | R Shane | 6 | 6 |
| 3 | P Polansky | 7 | 6 | | | | | | | | | | | | B Rola | 4 | 3 |
| WC | P Kypson | 5 | 2 | | 3 | P Polansky | 3 | 4 | | | | | | | | | |
| WC | Alexander Brown | 2 | 6$^6$ | | | B Rola | 6 | 6 | | | | | | | | | |
| | B Rola | 6 | 7$^8$ | | | | | | | | B Rola | 7$^7$ | 6 | | | | |
| Q | R Roelofse | 3 | 4 | | | | | | | | S Bangoura | 6$^2$ | 3 | | | | |
| LL | Alafia Ayeni | 6 | 6 | | LL | A Ayeni | 7$^7$ | 2 | 3 | | | | | | | | |
| | S Bangoura | 6 | 3 | | | S Bangoura | 6$^3$ | 6 | 6 | | | | | | | | |
| 5 | H Laaksonen | 4 | 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 | Semifinals | Semifinals |
| 6 | N Milojević | 3 | 3 | | | | | | | | | | | | | | | |
| | M Ymer | 6 | 6 | | | M Ymer | 1 | 4 | | | | | | | | | | |
| | TK Wang | 6 | 6 | | | TK Wang | 6 | 6 | | | | | | | | | | |
| | JC Aragone | 3 | 1 | | | | | | | | TK Wang | 2 | 2 | | | | | |
| WC | S Korda | 5 | 7$^7$ | 4 | | | | | | 4 | R Opelka | 6 | 6 | | | | | |
| | K Uchida | 7 | 6$^5$ | 6 | | K Uchida | 7$^7$ | 4 | 6$^3$ | | | | | | | | | |
| | L Glasspool | 6$^3$ | 6$^2$ | | 4 | R Opelka | 6$^3$ | 6 | 7$^7$ | | | | | | | | | |
| 4 | R Opelka | 7$^7$ | 7$^7$ | | | | | | | | | | | 4 | R Opelka | 2 | 6 | 6 |
| 7 | C Eubanks | 6 | 3 | 6 | | | | | | | | | | | T Paul | 6 | 4 | 4 |
| | K King | 4 | 6 | 3 | 7 | C Eubanks | w/o | | | | | | | | | | | |
| | H Heliövaara | 3 | 7 | 6 | | H Heliövaara | | | | | | | | | | | | |
| Q | M Torpegaard | 6 | 5 | 4 | | | | | | 7 | C Eubanks | 2 | 6$^3$ | | | | | |
| | J. J. Wolf | 5 | 5 | | | | | | | | T Paul | 6 | 7$^7$ | | | | | |
| | Jared Hiltzik | 7 | 7 | | | J Hiltzik | 6$^3$ | 4 | | | | | | | | | | |
| | T Paul | 6 | 4 | 6 | | T Paul | 7$^7$ | 6 | | | | | | | | | | |
| 2 | U Humbert | 4 | 6 | 2 | | | | | | | | | | | | | | |