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]
See main article: 2023 Swiss Indoors – Singles.
Félix Auger-Aliassime def. 
Hubert Hurkacz, 7–6(7–3), 7–6(7–5)See main article: 2023 Swiss Indoors – Doubles.
Santiago González / 
Édouard Roger-Vasselin def. Hugo Nys / Jan Zieliński, 6–7(8–10), 7–6(7–3), [10–1]| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Holger Rune | 6 | 1 | ||
| Casper Ruud | 8 | 2 | ||
| Taylor Fritz | 10 | 3 | ||
| Hubert Hurkacz | 11 | 4 | ||
 Australia | Alex de Minaur | 13 | 5 | |
| Félix Auger-Aliassime | 17 | 6 | ||
| Nicolás Jarry | 21 | 7 | ||
 United States | Sebastian Korda | 23 | 8 |
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 Stan Wawrinka Alejandro Davidovich Fokina → replaced by Yannick Hanfmann
Laslo Djere → replaced by 
Thiago Seyboth Wild Milos Raonic → replaced by Miomir Kecmanović| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Ivan Dodig | United States | Austin Krajicek | 3 | 1 | ||
 Argentina | Máximo González | Argentina | Andrés Molteni | 23 | 2 | |
| Mexico | Santiago González | France | Édouard Roger-Vasselin | 27 | 3 | |
 United Kingdom | Jamie Murray |  New Zealand | Michael Venus | 37 | 4 |
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:
