2011 Delray Beach International Tennis Championships – Singles

Ernests Gulbis was the defending champion but decided to participate in the 2011 Dubai Tennis Championships instead.

Juan Martín del Potro won this tournament, by defeating Janko Tipsarević 6–4, 6–4 in the final.

Seeds
• # 🇺🇸 Andy Roddick (withdrew due to flu)

• # 🇺🇸 Mardy Fish (semifinals)

• # 🇺🇸 Sam Querrey (second round)

• # 🇺🇸 John Isner (first round)

• # Kevin Anderson (quarterfinals)

• # 🇷🇸 Janko Tipsarević (final)

• # 🇩🇪 Benjamin Becker (first round)

• # 🇫🇷 Adrian Mannarino (second round)