2020 Astana Open – Singles

This was the first edition of the tournament, primarily organised due to the cancellation of many tournaments during the 2020 season, because of the ongoing COVID-19 pandemic.

Fourth seed John Millman won his first ATP Tour title, defeating third seed Adrian Mannarino in the final, 7–5, 6–1. He saved two match points against Tommy Paul in quarterfinals.

Seeds
• # 🇫🇷 Benoît Paire (second round)

• # 🇷🇸 Miomir Kecmanović (second round)

• # 🇫🇷 Adrian Mannarino (final)

• # 🇦🇺 John Millman (champion)

• # 🇺🇸 Tennys Sandgren (first round)

• # 🇰🇿 Alexander Bublik (first round)

• # 🇺🇸 Tommy Paul (quarterfinals)

• # 🇦🇺 Jordan Thompson (second round)

Seeds
• # 🇩🇪 Yannick Hanfmann (qualifying competition)

• # 🇫🇮 Emil Ruusuvuori (qualified)

• # 🇯🇵 Yūichi Sugita (qualified)

• # 🇦🇺 Alexei Popyrin (qualifying competition)

• # 🇷🇺 Aslan Karatsev (qualified)

• # 🇧🇦 Damir Džumhur (qualified)

• # 🇦🇺 Marc Polmans (qualifying competition)

• # 🇷🇺 Evgeny Donskoy (first round)

Qualifiers

 * 1) 🇧🇦 Damir Džumhur
 * 2) 🇫🇮 Emil Ruusuvuori
 * 3) 🇯🇵 Yūichi Sugita
 * 4) 🇷🇺 Aslan Karatsev