2015 Open Harmonie mutuelle – Singles

Andreas Beck was the defending champion, but lost in the second round.

Nicolas Mahut won the title, defeating Yūichi Sugita in the final, 3–6, 7–6(7–3), 6–4.

Seeds
• # 🇫🇷 Lucas Pouille (semifinals)

• # 🇩🇪 Andreas Beck (second round)

• # 🇫🇷 Nicolas Mahut (champion)

• # Igor Sijsling (first round)

• # 🇯🇵 Yūichi Sugita (final)

• # 🇨🇿 Jan Hernych (second round)

• # 🇫🇷 David Guez (first round)

• # 🇬🇧 Edward Corrie (first round)