2020 Sibiu Open – Singles

Danilo Petrović was the defending champion but chose not to defend his title.

Marc-Andrea Hüsler won the title after defeating Tomás Martín Etcheverry 7–5, 6–0 in the final.

Seeds
• # 🇫🇷 Arthur Rinderknech (second round)

• # 🇫🇷 Quentin Halys (first round)

• # Marc-Andrea Hüsler (champion)

• # 🇦🇷 Francisco Cerúndolo (semifinals)

• # 🇷🇺 Evgeny Karlovskiy (first round)

• # 🇪🇸 Adrián Menéndez Maceiras (first round)

• # 🇹🇳 Malek Jaziri (quarterfinals)

• # 🇯🇵 Shuichi Sekiguchi (second round)