2019 Estoril Open – Singles

João Sousa was the defending champion, but lost in the second round to David Goffin.

Stefanos Tsitsipas won the title, defeating Pablo Cuevas in the final, 6–3, 7–6(7–4).

Seeds
The top four seeds received a bye into the second round. • # Stefanos Tsitsipas (champion)

• #🇮🇹 Fabio Fognini (withdrew)

• #🇫🇷 Gaël Monfils (quarterfinals)

• #🇧🇪 David Goffin (semifinals)

• #🇷🇸 Dušan Lajović (first round)

• #🇦🇺 Alex de Minaur (first round)

• #🇪🇸 Pablo Carreño Busta (first round)

• #🇺🇸 Frances Tiafoe (quarterfinals)

Seeds
• # Pablo Cuevas (qualifying competition, lucky loser)

• # 🇬🇧 Dan Evans (qualifying competition)

• # 🇸🇪 Elias Ymer (first round)

• # 🇦🇺 Alexei Popyrin (qualified)

• # 🇸🇰 Jozef Kovalík (first round)

• # 🇺🇸 Bjorn Fratangelo (first round)

• # 🇧🇾 Egor Gerasimov (first round)

• # 🇪🇸 Pedro Martínez (first round)

Qualifiers
• # 🇮🇹 Salvatore Caruso

• # 🇪🇸 Alejandro Davidovich Fokina

• # João Domingues

• # 🇦🇺 Alexei Popyrin

Lucky losers
• # Pablo Cuevas

• # 🇮🇹 Filippo Baldi