2014 U.S. Men's Clay Court Championships – Singles

John Isner was the defending champion, but lost in the second round to Dustin Brown.

Fernando Verdasco won the title, defeating Nicolás Almagro in the final, 6–3, 7–6(7–4).

Seeds
The top four seeds received a bye into the second round.

🇺🇸 John Isner (second round) 🇪🇸 Tommy Robredo (second round) 🇪🇸 Nicolás Almagro (final) 🇪🇸 Fernando Verdasco (champion) 🇪🇸 Feliciano López (second round, retired) 🇦🇷 Juan Mónaco (second round) 🇦🇺 Lleyton Hewitt (second round) Ivo Karlović (first round)

Seeds
🇺🇸 Ryan Harrison (qualified) 🇺🇸 Alex Kuznetsov (first round) 🇨🇦 Peter Polansky (qualified) 🇺🇸 Wayne Odesnik (first round) Thiemo de Bakker (qualifying competition) 🇧🇪 Ruben Bemelmans (qualifying competition) 🇪🇸 Rubén Ramírez Hidalgo (qualified) 🇺🇦 Illya Marchenko (second round)

Qualifiers

 * 1) 🇺🇸 Ryan Harrison
 * 2) 🇺🇸 Robby Ginepri
 * 3) 🇨🇦 Peter Polansky
 * 4) 🇪🇸 Rubén Ramírez Hidalgo