2017 Estoril Open – Singles

Nicolás Almagro was the defending champion, but lost in the quarterfinals to Pablo Carreño Busta.

Carreño Busta went on to win the title, defeating Gilles Müller in the final, 6–2, 7–6(7–5).

Seeds
The top four seeds receive a bye into the second round. • #🇪🇸 Pablo Carreño Busta (champion)

• #🇫🇷 Richard Gasquet (quarterfinals)

• #🇱🇺 Gilles Müller (final)

• #🇪🇸 David Ferrer (semifinals)

• #🇦🇷 Juan Martín del Potro (second round, withdrew)

• # João Sousa (first round)

• #🇬🇧 Kyle Edmund (first round)

• #🇫🇷 Benoît Paire (first round)

Seeds
• # 🇺🇸 Ernesto Escobedo (qualifying competition)

• # 🇷🇺 Andrey Rublev (qualifying competition)

• # 🇪🇸 Íñigo Cervantes (first round)

• # 🇫🇷 Kenny de Schepper (qualifying competition)

• # 🇺🇸 Bjorn Fratangelo (qualified)

• # 🇮🇹 Federico Gaio (first round)

• # Ernests Gulbis (first round, retired)

• # 🇸🇪 Elias Ymer (qualified)

Qualifiers
• # 🇸🇪 Elias Ymer

• # 🇺🇸 Bjorn Fratangelo

• # João Domingues

• # 🇮🇹 Salvatore Caruso