2012 Intersport Heilbronn Open – Singles

Björn Phau won the title, defeating Ruben Bemelmans in the final 6–7(4–7), 6–3, 6–4.

Defending champion Bastian Knittel lost in the second round to Ruben Bemelmans.

Seeds
• # 🇱🇺 Gilles Müller (first round)

• # 🇩🇪 Cedrik-Marcel Stebe (semifinals)

• # 🇩🇪 Matthias Bachinger (second round)

• # 🇺🇸 Michael Russell (second round)

• # 🇸🇰 Karol Beck (second round)

• # 🇩🇪 Michael Berrer (quarterfinals)

• # 🇸🇮 Grega Žemlja (first round)

• # 🇩🇪 Daniel Brands (first round)