Adrian Mannarino defeated Sebastian Korda in the final, 4–6, 6–3, 6–2 to win the singles tennis title at the 2023 Astana Open. Mannarino won his second ATP Tour title of the season. Korda was contending for his first ATP Tour hardcourt title, but suffered a fifth loss in a tour-level hardcourt final.[1][2]
Novak Djokovic was the reigning champion,[3] but chose not to compete this year.
The top four seeds received a bye into the second round.
Tallon Griekspoor (quarterfinals)
Sebastián Báez (second round)
Alexander Bublik (second round)
Jiří Lehečka (quarterfinals)
Sebastian Korda (final)
Adrian Mannarino (champion)
Laslo Djere (first round, retired).svg/1280px-Flag_of_Switzerland_(Pantone).svg.png){kind=small}
Stan Wawrinka (first round)
Borna Gojo (withdrew) Alexandre Müller (qualifying competition)
Fábián Marozsán (first round)
Taro Daniel (qualifying competition)
Jurij Rodionov (qualified) Sho Shimabukuro (qualified)
Damir Džumhur (qualifying competition).svg/1280px-Flag_of_Belgium_(civil).svg.png){kind=small}
Zizou Bergs (first round)