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 SeedZdeněk Kolář1781Lorenzo Giustino2142Rio Noguchi2293Rodrigo Pacheco Méndez2314Kaichi Uchida2525Joel Schwärzler2566Andres Martin2717Sun Fajing2768 1 Rankings are as of 29 December 2025.
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: Arthur Weber
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