2020 Lisboa Belém Open – Singles

Roberto Carballés Baena was the defending champion but chose not to defend his title.

Jaume Munar won the title after defeating Pedro Sousa 7–6(7–3), 6–2 in the final.

Seeds
• # 🇪🇸 Jaume Munar (champion)

• # Pedro Sousa (final)

• # 🇧🇦 Damir Džumhur (first round)

• # 🇮🇹 Paolo Lorenzi (second round)

• # 🇮🇹 Federico Gaio (semifinals)

• # Tallon Griekspoor (second round, retired)

• # Blaž Rola (first round)

• # João Domingues (first round)