# 2018 Oracle Challenger Series – Houston – Men's singles

This was the first edition of the tournament.
Bradley Klahn won the title after defeating Roy Smith 7–6$^{(7–4)}$, 7–6$^{(7–4)}$ in the final.

## Seeds

* Tennys Sandgren (first round)
* Bradley Klahn (champion)
* Ivo Karlović (quarterfinals)
* Paolo Lorenzi (second round)
* Jason Jung (quarterfinals)
* Bjorn Fratangelo (first round, retired)
* Tim Smyczek (first round)
* Dominik Köpfer (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 |
| | Kamil Majchrzak | 4 | 3$^r$ | | | | |
| WC | Roy Smith | 6 | 2 | | | | |
| WC | Roy Smith | 6 | 2 | WC | Roy Smith | 6$^4$ | 6$^4$ |
| | | | | 2 | Bradley Klahn | 7$^7$ | 7$^7$ |
| 8 | Dominik Köpfer | 3 | 4 | 2 | Bradley Klahn | 7$^7$ | 7$^7$ |
| 2 | Bradley Klahn | 6 | 6 | | | | |

### 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 | T Sandgren | 2 | 5 | | | | | | | | | | | | | | | |
| | K Majchrzak | 6 | 7 | | | K Majchrzak | 6 | 4 | 6 | | | | | | | | | |
| WC | Sumit Sarkar | 6$^1$ | 1 | | | R Ortega Olmedo | 3 | 6 | 3 | | | | | | | | | |
| | R Ortega Olmedo | 7$^7$ | 6 | | | | | | | | K Majchrzak | 7$^7$ | 6$^2$ | 6 | | | | |
| | E Couacaud | 6 | 6 | | | | | | | 5 | J Jung | 6$^5$ | 7$^7$ | 3 | | | | |
| WC | R Schneider | 4 | 3 | | | E Couacaud | 1 | 6$^3$ | | | | | | | | | | |
| | R Cid Subervi | 1 | 1 | | 5 | J Jung | 6 | 7$^7$ | | | | | | | | | | |
| 5 | J Jung | 6 | 6 | | | | | | | | | | | | | K Majchrzak | 4 | 3$^r$ |
| 4 | P Lorenzi | 6 | 3 | 6 | | | | | | | | | | | WC | R Smith | 6 | 2 |
| | S Kozlov | 4 | 6 | 4 | 4 | P Lorenzi | 4 | 4 | | | | | | | | | | |
| | T-S Kwiatkowski | 7$^8$ | 4 | 6 | | T-S Kwiatkowski | 6 | 6 | | | | | | | | | | |
| | M Krueger | 6$^6$ | 6 | 4 | | | | | | | T-S Kwiatkowski | 6 | 6$^5$ | 6$^1$ | | | | |
| | D King | 3 | 6 | 6$^4$ | | | | | | WC | R Smith | 4 | 7$^7$ | 7$^7$ | | | | |
| WC | Roy Smith | 6 | 3 | 7$^7$ | WC | R Smith | 6 | 6 | | | | | | | | | | |
| Q | Harrison Adams | 6 | 7 | | Q | H Adams | 3 | 4 | | | | | | | | | | |
| 7 | T Smyczek | 3 | 5 | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 8 | D Köpfer | 7$^7$ | 3 | 6 | | | | | | | | | | | | | | |
| | M Arévalo | 6$^4$ | 6 | 4 | 8 | D Köpfer | 6 | 7 | | | | | | | | | | |
| Q | J Lenz | 6 | 3 | 6$^6$ | | E Escobedo | 1 | 5 | | | | | | | | | | |
| | E Escobedo | 4 | 6 | 7$^8$ | | | | | | 8 | D Köpfer | 6 | 6 | | | | | |
| | E Gómez | 6 | 6 | | | | | | | 3 | I Karlović | 1 | 4 | | | | | |
| | DE Galán | 1 | 4 | | | E Gómez | 6$^1$ | 3 | | | | | | | | | | |
| | M Giron | 4 | 2 | | 3 | I Karlović | 7$^7$ | 6 | | | | | | | | | | |
| 3 | I Karlović | 6 | 6 | | | | | | | | | | | | 8 | D Köpfer | 3 | 4 |
| 6 | B Fratangelo | 3 | 0$^r$ | | | | | | | | | | | | 2 | B Klahn | 6 | 6 |
| | Evan Song | 6 | 0 | | | E Song | 6 | 3 | 6 | | | | | | | | | |
| Q | A Galarneau | 6 | 6 | | Q | A Galarneau | 2 | 6 | 2 | | | | | | | | | |
| WC | T Fawcett | 3 | 2 | | | | | | | | E Song | 3 | 6 | 1 | | | | |
| Q | Mi Redlicki | 6 | 1 | 6 | | | | | | 2 | B Klahn | 6 | 4 | 6 | | | | |
| | J Hernández-Fernández | 4 | 6 | 4 | Q | Mi Redlicki | 4 | 4 | | | | | | | | | | |
| | A Sarkissian | 1 | 2 | | 2 | B Klahn | 6 | 6 | | | | | | | | | | |
| 2 | B Klahn | 6 | 6 | | | | | | | | | | | | | | | |