# 2022 Nonthaburi Challenger II – Singles

Valentin Vacherot was the defending champion but lost in the quarterfinals to Beibit Zhukayev.
Arthur Cazaux won the title after defeating Omar Jasika 7–6$^{(8–6)}$, 6–4 in the final.

## Seeds

* Yosuke Watanuki (second round)
* Alastair Gray (first round)
* Yasutaka Uchiyama (withdrew)
* Denis Yevseyev (first round)
* Gabriel Décamps (semifinals, retired)
* Billy Harris (second round)
* Illya Marchenko (second round)
* Nicola Kuhn (withdrew)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| Q | Beibit Zhukayev | 1 | 6$^6$ | | | | | |
| Q | Arthur Cazaux | 6 | 7$^8$ | | | | | |
| Q | Arthur Cazaux | 6 | 7$^8$ | | Q | Arthur Cazaux | 7$^8$ | 6 |
| | | | | | Alt | Omar Jasika | 6$^6$ | 4 |
| 5 | Gabriel Décamps | 7 | 4 | 0$^r$ | Alt | Omar Jasika | 6$^6$ | 4 |
| Alt | Omar Jasika | 5 | 6 | 3 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | Yo Watanuki | 6 | 6 | | | | | | | | | | | | | | | |
| | A Kachmazov | 1 | 3 | | 1 | Yo Watanuki | 6$^2$ | 3 | | | | | | | | | | |
| | A Santillan | 1 | 6 | 3 | SE | V Vacherot | 7$^7$ | 6 | | | | | | | | | | |
| SE | V Vacherot | 6 | 2 | 6 | | | | | | SE | V Vacherot | 5 | 6 | 6$^2$ | | | | |
| LL | D Cukierman | 2 | 4 | | | | | | | Q | B Zhukayev | 7 | 3 | 7$^7$ | | | | |
| | S Shimabukuro | 6 | 6 | | | S Shimabukuro | 6 | 3 | 4 | | | | | | | | | |
| Q | B Zhukayev | 6 | 7$^{10}$ | | Q | B Zhukayev | 2 | 6 | 6 | | | | | | | | | |
| LL | Y Shimizu | 3 | 6$^8$ | | | | | | | | | | | | Q | B Zhukayev | 1 | 6$^6$ |
| 4 | D Yevseyev | 6 | 0 | 0 | | | | | | | | | | | Q | A Cazaux | 6 | 7$^8$ |
| | D Sweeny | 3 | 6 | 6 | | D Sweeny | 6 | 6 | | | | | | | | | | |
| | B Lock | 5 | 3 | | | E Donskoy | 4 | 4 | | | | | | | | | | |
| | E Donskoy | 7 | 6 | | | | | | | | D Sweeny | 1 | 4 | | | | | |
| WC | Krittin Koaykul | 2 | 1 | | | | | | | Q | A Cazaux | 6 | 6 | | | | | |
| Q | A Cazaux | 6 | 6 | | Q | A Cazaux | 6 | 6 | | | | | | | | | | |
| Q | Y-s Chung | 3 | 6 | 4 | 6 | B Harris | 1 | 1 | | | | | | | | | | |
| 6 | B Harris | 6 | 4 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | G Décamps | 6 | 6 | | | | | | | | | | | | | | | | |
| | S Fomin | 2 | 2 | | 5 | G Décamps | 6 | 6 | | | | | | | | | | | |
| WC | K Samrej | 7$^8$ | 6 | | WC | K Samrej | 4 | 4 | | | | | | | | | | | |
| WC | Thanapet Chanta | 6$^6$ | 1 | | | | | | | 5 | G Décamps | 6 | 7 | | | | | | |
| | Y Bu | 7$^9$ | 2 | 2 | | | | | | | F Gaio | 3 | 5 | | | | | | |
| | F Gaio | 6$^7$ | 6 | 6 | | F Gaio | 7 | 7 | | | | | | | | | | | |
| | NH Lý | 3 | 6 | 6 | | NH Lý | 5 | 5 | | | | | | | | | | | |
| LL | J McCabe | 6 | 3 | 2 | | | | | | | | | | | 5 | G Décamps | 7 | 4 | 0$^r$ |
| 7 | I Marchenko | 6 | 6 | | | | | | | | | | | | Alt | O Jasika | 5 | 6 | 3 |
| | Y Oliel | 3 | 2 | | 7 | I Marchenko | 6 | 3 | 4 | | | | | | | | | | |
| Alt | O Jasika | 7 | 6 | | Alt | O Jasika | 2 | 6 | 6 | | | | | | | | | | |
| | P Gunneswaran | 5 | 3 | | | | | | | Alt | O Jasika | 6 | 1 | 6 | | | | | |
| Q | C Broom | 7 | 7$^7$ | | | | | | | Q | C Broom | 1 | 6 | 3 | | | | | |
| Q | T Schoolkate | 5 | 6$^4$ | | Q | C Broom | 3 | 6 | 7$^9$ | | | | | | | | | | |
| Q | B Patael | 6 | 4 | 6 | Q | B Patael | 6 | 3 | 6$^7$ | | | | | | | | | | |
| 2 | A Gray | 3 | 6 | 4 | | | | | | | | | | | | | | | |