2011 Atlanta Tennis Championships – Singles

Mardy Fish was the defending champion, and in a repeat of the previous year's final, he successfully defended his title by defeating his compatriot John Isner after dropping the opening set. This time the score was 3–6, 7–6(8–6), 6–2.

Seeds
The top four seeds received a bye into the second round. • # 🇺🇸 Mardy Fish (champion)

• # Kevin Anderson (quarterfinals)

• # 🇺🇸 John Isner (final)

• # 🇧🇪 Xavier Malisse (second round)

• # 🇧🇬 Grigor Dimitrov (first round)

• # 🇷🇺 Igor Kunitsyn (first round)

• # 🇺🇸 Alex Bogomolov Jr. (first round)

• # 🇮🇳 Somdev Devvarman (quarterfinals)