2020 Prosperita Open – Singles

Kamil Majchrzak was the defending champion but chose not to defend his title.

Aslan Karatsev won the title after defeating Oscar Otte 6–4, 6–2 in the final.

Seeds
• # Henri Laaksonen (second round)

• # 🇧🇾 Ilya Ivashka (quarterfinals)

• # 🇰🇷 Chung Hyeon (first round)

• # Ernests Gulbis (second round)

• # 🇸🇰 Martin Kližan (first round)

• # 🇫🇷 Arthur Rinderknech (withdrew)

• # 🇨🇦 Steven Diez (second round)

• # 🇺🇦 Sergiy Stakhovsky (second round, retired)