2026 Nonthaburi Challenger II

The 2026 Nonthaburi Challenger II was a professional tennis tournament played on hard courts. It was the 15th edition of the tournament which was part of the 2026 ATP Challenger Tour. It took place in Nonthaburi, Thailand from 12 to 17 January 2026.

Singles main-draw entrants

Seeds

¹ Rankings are as of 5 January 2026.

Other entrants

The following players received wildcards into the singles main draw:

Maximus Jones
Kasidit Samrej
Wishaya Trongcharoenchaikul

The following player received entry into the singles main draw using a protected ranking:~~Jason Jung~~
The following players received entry from the qualifying draw:

Chung Hyeon
Marek Gengel
Philip Henning
Christian Langmo
Neil Oberleitner
Yasutaka Uchiyama

The following player received entry as a lucky loser:

Andre Ilagan

Champions

Singles

Pol Martín Tiffon def. Maximus Jones 6–4, 3–6, 6–4.

Doubles

Sriram Balaji / Neil Oberleitner def. Anirudh Chandrasekar / Takeru Yuzuki 6–3, 7–6.