2017 Gerry Weber Open – Singles

Roger Federer defeated Alexander Zverev in the final, 6–1, 6–3 to win the singles tennis title at the 2017 Halle Open. It was his record-extending ninth title in Halle. He did not lose a single set in the entire tournament.

Florian Mayer was the defending champion, but lost to Federer in the quarterfinals.

Seeds
• # Roger Federer (champion)

• #🇦🇹 Dominic Thiem (second round)

• #🇯🇵 Kei Nishikori (second round, retired)

• #🇩🇪 Alexander Zverev (final)

• #🇫🇷 Gaël Monfils (first round)

• #🇫🇷 Lucas Pouille (second round)

• #🇪🇸 Roberto Bautista Agut (quarterfinals)

• #🇪🇸 Albert Ramos Viñolas (first round)

Seeds
• # 🇯🇵 Yūichi Sugita (qualifying competition, lucky loser)

• # 🇺🇿 Denis Istomin (first round)

• # 🇮🇹 Andreas Seppi (qualifying competition)

• # 🇺🇸 Ernesto Escobedo (qualifying competition, retired)

• # 🇷🇺 Andrey Kuznetsov (first round)

• # 🇨🇦 Vasek Pospisil (qualified)

• # 🇷🇺 Mikhail Youzhny (qualified)

• # 🇸🇰 Lukáš Lacko (qualified)

Qualifiers
• # 🇷🇺 Mikhail Youzhny

• # 🇩🇪 Maximilian Marterer

• # 🇸🇰 Lukáš Lacko

• # 🇨🇦 Vasek Pospisil

Lucky loser

 * 1) 🇯🇵 Yūichi Sugita