Marin Čilić was the defending champion, but withdrew due to injury.
Ivo Karlović won the title, defeating Donald Young in the final, 6–3, 6–3.
Seeds
Kevin Anderson (second round) John Isner (first round) Alexandr Dolgopolov (quarterfinals) Ivo Karlović (champion) Adrian Mannarino (semifinals) Sam Querrey (first round, retired) Steve Johnson (quarterfinals) Viktor Troicki (second round)
Draw
Finals
Top half
Bottom half
Qualifying
Seeds
Aljaž Bedene (second round) Victor Hănescu (qualifying competition) Thanasi Kokkinakis (qualified) Yoshihito Nishioka (qualified) Ryan Harrison (withdrew) Chase Buchanan (second round) Alex Kuznetsov (qualifying competition) Jared Donaldson (first round)