| 2025 Swiss Indoors | |
|---|---|
| Date | 20–26 October | 
| Edition | 54th | 
| Category | ATP 500 | 
| Draw | 32S / 16D | 
| Surface | Hard / indoor | 
| Location | Basel, Switzerland | 
| Venue | St. Jakobshalle | 
| Champions | |
| Singles | |
|  João Fonseca | |
| Doubles | |
|  Marcel Granollers /  Horacio Zeballos | |
The 2025 Swiss Indoors Basel was a men's tennis tournament played on indoor hard courts. It was the 54th edition of the event, and part of the ATP 500 tournaments of the 2025 ATP Tour. It was held at the St. Jakobshalle in Basel, Switzerland, from 20 to 26 October 2025. [1]
 João Fonseca  def.
  João Fonseca  def.   Alejandro Davidovich Fokina, 6–3, 6–4
  Alejandro Davidovich Fokina, 6–3, 6–4 Marcel Granollers  /
  Marcel Granollers  /   Horacio Zeballos  def.
  Horacio Zeballos  def.   Adam Pavlásek /
  Adam Pavlásek /   Jan Zieliński, 6–2, 7–5
  Jan Zieliński, 6–2, 7–5| Country | Player | Rank1 | Seed | 
|---|---|---|---|
|  USA | Taylor Fritz | 4 | 1 | 
|  USA | Ben Shelton | 6 | 2 | 
|  DEN | |||
|  NOR | Casper Ruud | 12 | 4 | 
|  CAN | Félix Auger-Aliassime | 13 | 5 | 
|  CZE | Jiří Lehečka | 17 | 6 | 
|  CZE | Jakub Menšík | 19 | 7 | 
|  ESP | Alejandro Davidovich Fokina | 20 | 8 | 
|  CAN | Denis Shapovalov | 23 | 9 | 
The following players received wildcards into the singles main draw:
The following player received entry using a protected ranking:
The following player using a special exempt:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
 Zizou Bergs → replaced by
  Zizou Bergs → replaced by   David Goffin
  David Goffin  Benjamin Bonzi → replaced by
  Benjamin Bonzi → replaced by   Quentin Halys
  Quentin Halys  Arthur Fils → replaced by
  Arthur Fils → replaced by   Jenson Brooksby
  Jenson Brooksby  Arthur Rinderknech → replaced by
  Arthur Rinderknech → replaced by   Valentin Royer
  Valentin Royer  Holger Rune → replaced by
  Holger Rune → replaced by   Botic van de Zandschulp
  Botic van de Zandschulp | Country | Player | Country | Player | Rank1 | Seed | 
|---|---|---|---|---|---|
|  ESP | Marcel Granollers |  ARG | Horacio Zeballos | 15 | 1 | 
|  ITA | Simone Bolelli |  ITA | Andrea Vavassori | 29 | 2 | 
|  USA | Christian Harrison |  USA | Evan King | 33 | 3 | 
|  MON | Hugo Nys |  FRA | Édouard Roger-Vasselin | 37 | 4 | 
The following pairs received wildcards into the doubles main draw:
The following pair received entry from the qualifying draw: