2015 Gerry Weber Open – Singles

Roger Federer was the two-time defending champion and successfully defended his title, defeating Andreas Seppi in the final, 7–6(7–1), 6–4. It was his record-extending eighth title at the tournament.

Seeds
• # Roger Federer (champion)

• #🇯🇵 Kei Nishikori (semifinals, retired)

• #🇨🇿 Tomáš Berdych (quarterfinals)

• #🇫🇷 Gaël Monfils (quarterfinals, retired)

• #🇪🇸 Tommy Robredo (second round)

• # Pablo Cuevas (first round)

• #🇦🇺 Bernard Tomic (first round)

• # Ivo Karlović (semifinals)

Seeds
• # 🇨🇦 Vasek Pospisil (qualifying competition)

• # 🇫🇷 Benoît Paire (first round)

• # 🇫🇮 Jarkko Nieminen (qualified)

• # 🇸🇰 Lukáš Lacko (qualified)

• # Ričardas Berankis (qualified)

• # 🇧🇪 Ruben Bemelmans (first round)

• # 🇨🇴 Alejandro Falla (qualified)

• # 🇯🇵 Tatsuma Ito (qualifying competition)

Qualifiers
• # Ričardas Berankis

• # 🇨🇴 Alejandro Falla

• # 🇫🇮 Jarkko Nieminen

• # 🇸🇰 Lukáš Lacko