2011 Slovak Open – Men's singles

Martin Kližan was the defending champion but decided not to participate.

Lukáš Lacko won the title defeating Ričardas Berankis in the final 7–6(9–7), 6–2.

Seeds
• # 🇵🇱 Łukasz Kubot (first round)

• # 🇺🇦 Sergiy Stakhovsky (quarterfinals)

• # 🇺🇿 Denis Istomin (first round)

• # 🇨🇿 Lukáš Rosol (semifinals)

• # 🇦🇺 Matthew Ebden (second round)

• # 🇫🇷 Adrian Mannarino (quarterfinals)

• # 🇩🇪 Michael Berrer (quarterfinals)

• # 🇫🇷 Stéphane Robert (second round)