# 2022 Nonthaburi Challenger – Singles

This was the first edition of the tournament.
Valentin Vacherot won the title after defeating Lý Hoàng Nam 6–3, 7–6$^{(7–4)}$ in the final.

## Seeds

* Alastair Gray (quarterfinals)
* Yasutaka Uchiyama (semifinals)
* Denis Yevseyev (second round, retired)
* Billy Harris (first round)
* Gabriel Décamps (second round)
* Yshai Oliel (first round)
* Nicola Kuhn (second round)
* Illya Marchenko (second round)

## 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 |
| | Lý Hoàng Nam | 6 | 6$^2$ | 6 | | | | |
| | Dane Sweeny | 4 | 7$^7$ | 3 | | | | |
| | Dane Sweeny | 4 | 7$^7$ | 3 | | Lý Hoàng Nam | 3 | 6$^4$ |
| | | | | | Q | Valentin Vacherot | 6 | 7$^7$ |
| Q | Valentin Vacherot | 6 | 5 | 7$^8$ | Q | Valentin Vacherot | 6 | 7$^7$ |
| 2 | Yasutaka Uchiyama | 3 | 7 | 6$^6$ | | | | |

### 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 | A Gray | 7$^8$ | 6 | | | | | | | | | | | | | | | |
| | A Cazaux | 6$^6$ | 4 | | 1 | A Gray | 6 | 4 | 6 | | | | | | | | | |
| | E Donskoy | 6 | 6 | | | E Donskoy | 3 | 6 | 3 | | | | | | | | | |
| | P Gunneswaran | 3 | 3 | | | | | | | 1 | A Gray | 4 | 5 | | | | | |
| | NH Lý | 6 | 7$^7$ | | | | | | | | NH Lý | 6 | 7 | | | | | |
| Q | D Kelly | 4 | 6$^4$ | | | NH Lý | 4 | 6 | 7 | | | | | | | | | |
| | J Jung | 6$^1$ | 2 | | 8 | I Marchenko | 6 | 1 | 5 | | | | | | | | | |
| 8 | I Marchenko | 7$^7$ | 6 | | | | | | | | | | | | NH Lý | 6 | 6$^2$ | 6 |
| 4 | B Harris | 6$^{10}$ | 6 | 3 | | | | | | | | | | | D Sweeny | 4 | 7$^7$ | 3 |
| | A Kachmazov | 7$^{12}$ | 3 | 6 | | A Kachmazov | 6 | 6 | | | | | | | | | | |
| | A Santillan | 7$^7$ | 5 | 6 | | A Santillan | 2 | 4 | | | | | | | | | | |
| WC | W Trongcharoenchaikul | 6$^2$ | 7 | 0 | | | | | | | A Kachmazov | 6 | 1 | 2 | | | | |
| | D Sweeny | 6 | 6 | | | | | | | | D Sweeny | 4 | 6 | 6 | | | | |
| WC | Y Charoenphon | 1 | 0 | | | D Sweeny | 6 | 6 | | | | | | | | | | |
| | S Fomin | 2 | 3$^r$ | | 5 | G Décamps | 3 | 4 | | | | | | | | | | |
| 5 | G Décamps | 6 | 4 | | | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | N Kuhn | 7 | 6 | | | | | | | | | | | | | | | |
| | B Lock | 5 | 3 | | 7 | N Kuhn | 5 | 3 | | | | | | | | | | |
| Q | V Vacherot | 6 | 6 | | Q | V Vacherot | 7 | 6 | | | | | | | | | | |
| Q | Gage Brymer | 1 | 4 | | | | | | | Q | V Vacherot | 6 | 6 | | | | | |
| WC | K Samrej | 2 | 6 | 4 | | | | | | Q | K Jacquet | 3 | 2 | | | | | |
| Q | K Jacquet | 6 | 4 | 6 | Q | K Jacquet | 6$^2$ | 7$^7$ | 3 | | | | | | | | | |
| | Y-h Hsu | 1$^r$ | | | 3 | D Yevseyev | 7$^7$ | 6$^4$ | 0$^r$ | | | | | | | | | |
| 3 | D Yevseyev | 2 | | | | | | | | | | | | Q | V Vacherot | 6 | 5 | 7$^8$ |
| 6 | Y Oliel | 2 | 6 | 1 | | | | | | | | | | 2 | Y Uchiyama | 3 | 7 | 6$^6$ |
| | F Gaio | 6 | 3 | 6 | | F Gaio | 0 | 5 | | | | | | | | | | |
| | B Zhukayev | 6 | 3 | 3 | | O Jasika | 6 | 7 | | | | | | | | | | |
| | O Jasika | 4 | 6 | 6 | | | | | | | O Jasika | 2 | 4 | | | | | |
| | Y Bu | 6 | 1 | 0$^r$ | | | | | | 2 | Y Uchiyama | 6 | 6 | | | | | |
| Q | S-c Hong | 4 | 6 | 3 | Q | S-c Hong | 3 | 3 | | | | | | | | | | |
| Q | Y Shimizu | 2 | 3 | | 2 | Y Uchiyama | 6 | 6 | | | | | | | | | | |
| 2 | Y Uchiyama | 6 | 6 | | | | | | | | | | | | | | | |