title: 2018 Oracle Challenger Series – Houston – Men's singles
text: # 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 | | | | | | | | | | | | | | | |
  