2015 Open de Rennes – Singles

Steve Darcis was the defending champion, but lost in the second round. Malek Jaziri won the title defeating Igor Sijsling in the final 5–7, 7–5, 6–4

Seeds
• # Robin Haase (first round)

• # 🇨🇴 Santiago Giraldo (first round)

• # 🇧🇪 Steve Darcis (second round)

• # 🇹🇳 Malek Jaziri (champion)

• # 🇷🇸 Filip Krajinović (second round)

• # 🇹🇷 Marsel İlhan (quarterfinals)

• # Ivan Dodig  (semifinals)

• # 🇺🇦 Illya Marchenko (semifinals)