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)