The 2023 Swiss Indoors was a men's tennis tournament played on indoor hard courts. It was the 52nd edition of the event, and part of the 500 series of the 2023 ATP Tour. It was held at the St. Jakobshalle in Basel, Switzerland, from 23 October until 29 October 2023. Sixth-seeded Félix Auger-Aliassime won his second consecutive singles title at the event.[1]
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Félix Auger-Aliassime def. 
Hubert Hurkacz, 7–6(7–3), 7–6(7–5)
Santiago González / 
Édouard Roger-Vasselin def. 
Hugo Nys / Jan Zieliński, 6–7(8–10), 7–6(7–3), [10–1]The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as a special exempt:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Carlos Alcaraz → replaced by .svg/1280px-Flag_of_Switzerland_(Pantone).svg.png){kind=small}
Stan Wawrinka Alejandro Davidovich Fokina → replaced by 
Yannick Hanfmann
Laslo Djere → replaced by 
Thiago Seyboth Wild Milos Raonic → replaced by Miomir Kecmanović
The following pairs received wildcards into the doubles main draw:
The following pair received entry from the qualifying draw:
The following pair received entry as lucky losers:
Marcel Granollers / 
Horacio Zeballos → replaced by Nikola Ćaćić / 
Victor Vlad Cornea
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