Japan Open · ATP
Japan Open 2026
ATP 500HardTokyo, Japan28 September – 6 October 2026Prize money: 2,342,275 USD43 matchesAltitude: 40 mCourt: Medium
Champion Carlos Alcaraz · Final: 6-4 6-2
Final rounds
| Final | Carlos Alcaraz vs Jiri Lehecka | 7-6(4) 6-4 |
| Semifinal | Jiri Lehecka vs Valentin Vacherot | 6-4 6-2 |
| Semifinal | Carlos Alcaraz vs Jaume Munar | 5-7 6-3 6-1 |
| Quarterfinal | Jiri Lehecka vs Adolfo Daniel Vallejo | 6-1 6-1 |
| Quarterfinal | Valentin Vacherot vs Arthur Fils | 7-5 4-6 6-4 |
| Quarterfinal | Carlos Alcaraz vs Denis Shapovalov | 7-6(3) 2-1 ret. |
| Quarterfinal | Jaume Munar vs Kyrian Jacquet | 6-4 6-2 |
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