2013 Intersport Heilbronn Open – Singles

Björn Phau was the defending champion but he retired in the first round. Michael Berrer defeated Jan-Lennard Struff 7–5, 6–3 in the final to win the title.

Seeds
• # 🇫🇷 Paul-Henri Mathieu (semifinals, retired)

• # 🇩🇪 Benjamin Becker (quarterfinals)

• # 🇱🇺 Gilles Müller (first round)

• # 🇩🇪 Björn Phau (first round, retired due to a knee injury)

• # 🇷🇴 Adrian Ungur (second round)

• # Ivo Karlović (first round, retired due to a back injury)

• # 🇨🇿 Jan Hájek (second round)

• # 🇧🇪 Ruben Bemelmans (quarterfinals)