2020 Slovak Open – Singles

Dennis Novak was the defending champion but chose not to defend his title.

Maximilian Marterer won the title after defeating Tomáš Macháč 6–7(3–7), 6–2, 7–5 in the final.

Seeds
• # 🇫🇮 Emil Ruusuvuori (quarterfinals)

• # 🇯🇵 Yasutaka Uchiyama (first round)

• # 🇵🇱 Kamil Majchrzak (second round)

• # 🇫🇷 Antoine Hoang (semifinals)

• # Henri Laaksonen (first round)

• # 🇷🇸 Nikola Milojević (second round)

• # 🇮🇹 Federico Gaio (first round)

• # 🇮🇹 Lorenzo Giustino (second round)