2017 ASB Classic – Men's singles

Roberto Bautista Agut was the defending champion, but withdrew due to a stomach virus.

Jack Sock won the title, defeating João Sousa in the final, 6–3, 5–7, 6–3.

Seeds
The top four seeds received a bye into the second round. • # 🇪🇸 Roberto Bautista Agut (withdrew due to a stomach virus)

• # 🇺🇸 John Isner (quarterfinals)

• # 🇪🇸 David Ferrer (second round)

• # 🇺🇸 Jack Sock (champion)

• # 🇪🇸 Albert Ramos Viñolas (first round)

• # 🇪🇸 Feliciano López (second round, withdrew)

• # 🇺🇸 Steve Johnson (semifinals)

• # 🇨🇾 Marcos Baghdatis (semifinals)

Seeds
• #🇺🇸 Ryan Harrison (qualified)

• #🇨🇦 Steven Diez (qualifying competition)

• #🇺🇸 Michael Mmoh (qualified)

• #🇬🇧 Cameron Norrie (qualifying competition)

• #🇵🇱 Jerzy Janowicz (qualifying competition)

• #🇬🇧 Brydan Klein (qualified)

• #🇳🇿 Jose Statham (qualifying competition, lucky loser)

• #🇳🇿 Finn Tearney (qualified)

Qualifiers
• # 🇺🇸 Ryan Harrison

• # 🇬🇧 Brydan Klein

• # 🇺🇸 Michael Mmoh

• # 🇳🇿 Finn Tearney

Lucky loser

 * 1) 🇳🇿 Jose Statham