2017 Fairfield Challenger – Singles

Santiago Giraldo was the defending champion but chose not to defend his title.

Mackenzie McDonald won the title after defeating Bradley Klahn 6–4, 6–2 in the final.

Seeds
• # 🇺🇸 Ernesto Escobedo (second round)

• # 🇺🇸 Tennys Sandgren (quarterfinals)

• # 🇺🇸 Bjorn Fratangelo (quarterfinals)

• # 🇩🇪 Maximilian Marterer (semifinals)

• # 🇬🇧 Cameron Norrie (withdrew)

• # 🇺🇸 Stefan Kozlov (first round)

• # 🇮🇳 Ramkumar Ramanathan (first round)

• # 🇷🇸 Nikola Milojević (quarterfinals)

• # 🇺🇸 Michael Mmoh (second round)