The 2019 Swiss Open Gstaad (also known as the 2019 J. Safra Sarasin Swiss Open Gstaad for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts. It was the 52nd edition of the Swiss Open, and part of the ATP Tour 250 Series of the 2019 ATP Tour. It took place at the Roy Emerson Arena in Gstaad, Switzerland, from 22 July through 29 July 2019.[1]
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Spain | Roberto Bautista Agut | 13 | 1 | |
| Spain | Fernando Verdasco | 26 | 2 | |
 Serbia | Dušan Lajović | 36 | 3 | |
 Italy | Lorenzo Sonego | 51 | 4 | |
| João Sousa | 56 | 5 | ||
| Spain | Roberto Carballés Baena | 77 | 6 | |
| Spain | Pablo Andújar | 79 | 7 | |
 France | Corentin Moutet | 81 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry using a protected ranking into the main draw:
The following players received entry from the qualifying draw:
Matteo Berrettini →replaced by 
Jiří Veselý
Guido Pella →replaced by Thomas Fabbiano| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Austria | Philipp Oswald |  Slovakia | Filip Polášek | 102 | 1 | |
 Ukraine | Denys Molchanov | Slovakia | Igor Zelenay | 132 | 2 | |
| Argentina | Guillermo Durán | Argentina | Andrés Molteni | 132 | 3 | |
 Belgium | Sander Gillé | Belgium | Joran Vliegen | 134 | 4 |
The following pairs received wildcards into the doubles main draw:
See main article: 2019 Swiss Open Gstaad – Singles.
Albert Ramos Viñolas def. Cedrik-Marcel Stebe, 6–3, 6–2See main article: 2019 Swiss Open Gstaad – Doubles.
Sander Gillé / Joran Vliegen def. Philipp Oswald / Filip Polášek, 6–4, 6–3