# 2024 Nonthaburi Challenger II – Singles

Valentin Vacherot was the defending champion and successfully defended his title, defeating Manuel Guinard 7–5, 7–6$^{(7–4)}$ in the final.

## Seeds

* Dennis Novak (quarterfinals)
* Jason Jung (second round)
* Lucas Poullain (first round)
* Evgeny Donskoy (first round)
* Coleman Wong (second round)
* Tennys Sandgren (second round)
* Henri Squire (first round)
* Brandon Holt (quarterfinals)

## 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 | Final | Final | Final |
| | Valentin Vacherot | w/o | | | | |
| | Arthur Fery | | | | | |
| | Arthur Fery | | | Valentin Vacherot | 7 | 7$^7$ |
| | | | | Manuel Guinard | 5 | 6$^4$ |
| Q | Rio Noguchi | 3 | 4 | Manuel Guinard | 5 | 6$^4$ |
| | Manuel Guinard | 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 | Semifinals | Semifinals |
| 1 | D Novak | 6 | 6 | | | | | | | | | | | | |
| | D Michalski | 3 | 0 | | 1 | D Novak | 7$^8$ | 6 | | | | | | | |
| WC | K Samrej | 2 | 3 | | WC | W Trongcharoenchaikul | 6$^6$ | 0 | | | | | | | |
| WC | W Trongcharoenchaikul | 6 | 6 | | | | | | | 1 | D Novak | 6$^3$ | 4 | | |
| | V Vacherot | 6 | 6 | | | | | | | | V Vacherot | 7$^7$ | 6 | | |
| Q | R Ramanathan | 4 | 3 | | | V Vacherot | 6$^2$ | 7$^7$ | 6 | | | | | | |
| | H Habib | 1 | 4 | | 6 | T Sandgren | 7$^7$ | 6$^2$ | 4 | | | | | | |
| 6 | T Sandgren | 6 | 6 | | | | | | | | | | | V Vacherot | w/o |
| 3 | Lucas Poullain | 0 | 2 | | | | | | | | | | | A Fery | |
| | S Caruso | 6 | 6 | | | S Caruso | 1 | 5 | | | | | | | |
| | ND Ionel | 2 | 2 | | | A Fery | 6 | 7 | | | | | | | |
| | A Fery | 6 | 6 | | | | | | | | A Fery | 6 | 6 | | |
| Q | H Moriya | 6 | 6 | | | | | | | Q | H Moriya | 3 | 4 | | |
| | S Diez | 3 | 0 | | Q | H Moriya | 7$^7$ | 6 | | | | | | | |
| Q | Y Takahashi | 6 | 1 | 6 | Q | Y Takahashi | 6$^5$ | 1 | | | | | | | |
| 7 | H Squire | 4 | 6 | 3 | | | | | | | | | | | |

### 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 |
| 5 | C Wong | 7$^8$ | 6 | | | | | | | | | | | | | | |
| | C-h Tseng | 6$^6$ | 3 | | 5 | C Wong | 7$^8$ | 1 | 4 | | | | | | | | |
| | B Tomic | 4 | 6 | 6$^5$ | | Y Uchiyama | 6$^6$ | 6 | 6 | | | | | | | | |
| | Y Uchiyama | 6 | 2 | 7$^7$ | | | | | | | Y Uchiyama | 2 | 0$^r$ | | | | |
| | K Uchida | 7 | 2 | 6$^1$ | | | | | | Q | R Noguchi | 6 | 1 | | | | |
| Q | R Noguchi | 5 | 6 | 7$^7$ | Q | R Noguchi | 1 | 6 | 6 | | | | | | | | |
| WC | Maximus Jones | 2 | 6 | 6 | WC | M Jones | 6 | 3 | 2 | | | | | | | | |
| 4 | E Donskoy | 6 | 3 | 1 | | | | | | | | | | Q | R Noguchi | 3 | 4 |
| 8 | B Holt | 6 | 6 | | | | | | | | | | | | M Guinard | 6 | 6 |
| | S-c Hong | 2 | 2 | | 8 | B Holt | 7$^{10}$ | 6 | | | | | | | | | |
| Alt | Dominik Palán | 7$^7$ | 4 | 6$^2$ | | G Fonio | 6$^8$ | 1 | | | | | | | | | |
| | G Fonio | 6$^5$ | 6 | 7$^7$ | | | | | | 8 | B Holt | 5 | 2 | | | | |
| | M Guinard | 6 | 6 | | | | | | | | M Guinard | 7 | 6 | | | | |
| Q | Christian Langmo | 3 | 3 | | | M Guinard | 6 | 7$^9$ | | | | | | | | | |
| Q | N Hardt | 4 | 2 | | 2 | J Jung | 1 | 6$^7$ | | | | | | | | | |
| 2 | J Jung | 6 | 6 | | | | | | | | | | | | | | |