Nonthaburi 3 challenger · ATP
Nonthaburi 3 challenger 2023
ChallengerHardNonthaburi, Thailand15 January – 22 January 2023Prize money: 40,000 USD49 matchesAltitude: 3 mCourt: Slow
Champion Sho Shimabukuro · Final: 6-0 6-7(7) 6-2
Final rounds
| Final | Sho Shimabukuro vs Arthur Cazaux | 6-2 7-5 |
| Semifinal | Sho Shimabukuro vs Seong Chan Hong | 6-2 7-5 |
| Semifinal | Arthur Cazaux vs Giovanni Fonio | 7-5 6-3 |
| Quarterfinal | Arthur Cazaux vs Tennys Sandgren | 7-6(4) 6-4 |
| Quarterfinal | Giovanni Fonio vs Antoine Escoffier | 7-5 6-7(5) 2-1 ret. |
| Quarterfinal | Seong Chan Hong vs Michael Geerts | 6-1 7-5 |
| Quarterfinal | Sho Shimabukuro vs Zdenek Kolar | 6-0 6-7(7) 6-2 |
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