2013 Sibiu Open – Singles

Adrian Ungur was the defending champion, but lost in the semifinals to Jaroslav Pospíšil.

Pospíšil went on to win the title, defeating Marco Cecchinato 4–6, 6–4, 6–1 in the final.

Seeds
• # 🇮🇹 Filippo Volandri (quarterfinals, retired)

• # 🇨🇿 Jan Hájek (second round)

• # 🇩🇪 Julian Reister (quarterfinals)

• # 🇦🇹 Andreas Haider-Maurer (first round)

• # 🇷🇴 Adrian Ungur (semifinals)

• # 🇷🇸 Dušan Lajović (semifinals)

• # 🇪🇸 Pere Riba (withdrew)

• # 🇮🇹 Marco Cecchinato (final)

• # Thomas Schoorel (second round)