Nonthaburi challenger · ATP
Nonthaburi challenger 2023
ChallengerHardNonthaburi, Thailand1 January – 7 January 2023Prize money: 80,000 USD49 matchesAltitude: 3 mCourt: Medium
Champion Dennis Novak · Final: 7-5 3-6 6-3
Final rounds
| Final | Dennis Novak vs Tung-lin Wu | 6-4 6-4 |
| Semifinal | Tung-lin Wu vs Lloyd Harris | 6-4 7-5 |
| Semifinal | Dennis Novak vs Antoine Escoffier | 6-3 6-2 |
| Quarterfinal | Antoine Escoffier vs Max Purcell | 6-2 7-6(8) |
| Quarterfinal | Lloyd Harris vs Yu Hsiou Hsu | 6-7(7) 6-3 6-4 |
| Quarterfinal | Dennis Novak vs Marek Gengel | 6-3 6-7(5) 6-3 |
| Quarterfinal | Tung-lin Wu vs Evgeny Donskoy | 7-5 3-6 6-3 |
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