Singles matchups, seeds and recorded results by round. Draw information appears as it is published.
Stefanos Tsitsipas won the Swiss Open Gstaad 2026 men's singles title from a draw of 28 players, beating Raphael Collignon 6-4 6(3)-7(7) 6-3 in the final.
8 players are seeded in the Swiss Open Gstaad 2026 men's singles draw, led by No. 1 seed Casper Ruud, and all 8 have been eliminated.
| Seed | Player | Rank | Fate |
|---|---|---|---|
| 1 | Casper Ruud | #17 | Round of 16 |
| 2 | Alexander Bublik | #10 | Quarterfinals |
| 3 | Valentin Vacherot | #20 | Quarterfinals |
| 4 | Arthur Rinderknech | #28 | Quarterfinals |
| 5 | Ignacio Buse | #34 | Round of 32 |
| 6 | Juan Manuel Cerundolo | #42 | Semifinals |
| 7 | Raphael Collignon | #43 | Runner-up |
| 8 | Jaume Munar | #44 | Round of 32 |
All 12 matchups set so far in the Round of 32 are complete and 4 players received a bye.
All 8 matchups set so far in the Round of 16 are complete.
All 4 matches in the Quarterfinals are complete.
All 2 matches in the Semifinals are complete.
Stefanos Tsitsipas beat Raphael Collignon 6-4 6(3)-7(7) 6-3 in the final.