2026 Nonthaburi Challenger
| 2026 Nonthaburi Challenger | |
|---|---|
| Date | 5 – 10 January |
| Edition | 14th |
| Surface | Hard |
| Location | Nonthaburi, Thailand |
| Champions | |
| Singles | |
 Rio Noguchi | |
| Doubles | |
 Daniel Cukierman /  Joel Schwärzler | |
The 2026 Nonthaburi Challenger was a professional tennis tournament played on hard courts. It was the 14th edition of the tournament which was part of the 2026 ATP Challenger Tour. It took place in Nonthaburi, Thailand from 5 to 10 January 2026.
Singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 CZE | Zdeněk Kolář | 178 | 1 |
 ITA | Lorenzo Giustino | 214 | 2 |
| JPN | Rio Noguchi | 229 | 3 |
 MEX | Rodrigo Pacheco Méndez | 231 | 4 |
| JPN | Kaichi Uchida | 252 | 5 |
| AUT | Joel Schwärzler | 256 | 6 |
 USA | Andres Martin | 271 | 7 |
 CHN | Sun Fajing | 276 | 8 |
- 1 Rankings are as of 29 December 2025.[1]
Other entrants
The following players received wildcards into the singles main draw:
Kasidit Samrej- Pawit Sornlaksup
- Wishaya Trongcharoenchaikul
The following players received entry from the qualifying draw:
- Tibo Colson
- Taisei Ichikawa
- Koki Matsuda
- Hayato Matsuoka
- Hiroki Moriya
- Hikaru Shiraishi
The following player received entry as a lucky loser:
Champions
Singles
- Rio Noguchi def. Marek Gengel 6–3, 6–4.
Doubles
- Daniel Cukierman / Joel Schwärzler def. Hsieh Cheng-peng / Huang Tsung-hao 6–3, 6–1.
References
- ^"Rankings | Singles | ATP Tour | Tennis". ATP Tour.