2021 Svijany Open – Singles

Nikola Milojević was the defending champion but lost in the second round to Tomáš Macháč.

Alex Molčan won the title after defeating Macháč 6–0, 6–1 in the final.

Seeds
• # 🇨🇿 Jiří Veselý (withdrew)

• # Tallon Griekspoor (first round)

• # 🇵🇱 Kamil Majchrzak (quarterfinals)

• # 🇸🇰 Andrej Martin (first round)

• # Botic van de Zandschulp (semifinals)

• # 🇦🇺 Marc Polmans (quarterfinals)

• # 🇨🇿 Tomáš Macháč (final)

• # 🇸🇰 Alex Molčan (champion)