# 2018 Bangkok Challenger II – Singles

Janko Tipsarević was the defending champion but chose not to defend his title.
Marcel Granollers won the title after defeating Enrique López Pérez 4–6, 6–2, 6–0 in the final.

## Seeds

* Marcel Granollers (champion)
* Enrique López Pérez (final)
* Pedro Martínez (quarterfinals)
* Yang Tsung-hua (first round)
* Ivan Nedelko (first round)
* Mats Moraing (semifinals)
* Yusuke Takahashi (quarterfinals)
* Matteo Viola (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 | Semifinals | Final | Final | Final | Final | Final |
| 1 | Marcel Granollers | 6 | 6 | | | | | | |
| | Bernabé Zapata Miralles | 3 | 0 | | | | | | |
| | Bernabé Zapata Miralles | 3 | 0 | | 1 | Marcel Granollers | 4 | 6 | 6 |
| | | | | | 2 | Enrique López Pérez | 6 | 2 | 0 |
| 6 | Mats Moraing | 7$^7$ | 1 | 6$^6$ | 2 | Enrique López Pérez | 6 | 2 | 0 |
| 2 | Enrique López Pérez | 6$^3$ | 6 | 7$^8$ | | | | | |

### 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 | Semifinals | Semifinals |
| 1 | M Granollers | 6 | 6 | | | | | | | | | | | | | | |
| WC | Pol Wattanakul | 2 | 0 | | 1 | M Granollers | 6 | 6 | | | | | | | | | |
| | B Lock | 4 | 2 | | PR | F Cipolla | 3 | 1 | | | | | | | | | |
| PR | F Cipolla | 6 | 6 | | | | | | | 1 | M Granollers | 6 | 6 | | | | |
| Q | E Ruusuvuori | 6 | 3 | 7 | | | | | | 7 | Y Takahashi | 4 | 1 | | | | |
| | Y Mertens | 4 | 6 | 5 | Q | E Ruusuvuori | 6 | 3 | 3 | | | | | | | | |
| | S Mukund | 2 | 7 | 0 | 7 | Y Takahashi | 3 | 6 | 6 | | | | | | | | |
| 7 | Y Takahashi | 6 | 5 | 6 | | | | | | | | | | 1 | M Granollers | 6 | 6 |
| 4 | T-h Yang | 4 | 3 | | | | | | | | | | | | B Zapata Miralles | 3 | 0 |
| Q | F Nielsen | 6 | 6 | | Q | F Nielsen | 4 | 2 | | | | | | | | | |
| | E Karlovskiy | 6 | 7 | | | E Karlovskiy | 6 | 6 | | | | | | | | | |
| | D Köpfer | 2 | 5 | | | | | | | | E Karlovskiy | 3 | 2 | | | | |
| | M İlhan | 6 | 6 | | | | | | | | B Zapata Miralles | 6 | 6 | | | | |
| | K Takeuchi | 1 | 2 | | | M İlhan | 3 | 3 | | | | | | | | | |
| | B Zapata Miralles | 5 | 6 | 7 | | B Zapata Miralles | 6 | 6 | | | | | | | | | |
| 5 | I Nedelko | 7 | 2 | 5 | | | | | | | | | | | | | |

### Bottom half

| 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 |
| 6 | Mats Moraing | 6 | 6 | | | | | | | | | | | | | | |
| Q | Yuya Kibi | 2 | 2 | 6 | M Moraing | 6 | 6 | | | | | | | | | | |
| WC | P Isaro | 6 | 6 | WC | P Isaro | 2 | 3 | | | | | | | | | | |
| WC | Thanapet Chanta | 0 | 2 | | | | | | 6 | M Moraing | 6 | 7 | | | | | |
| | S Diez | 6$^8$ | 4 | | | | | | 3 | P Martínez | 0 | 5 | | | | | |
| | G Granollers | 7$^{10}$ | 6 | | G Granollers | 6 | 4 | 5 | | | | | | | | | |
| | G Olaso | 4 | 4 | 3 | P Martínez | 3 | 6 | 7 | | | | | | | | | |
| 3 | P Martínez | 6 | 6 | | | | | | | | | | 6 | M Moraing | 7$^7$ | 1 | 6$^6$ |
| 8 | M Viola | 6 | 6 | | | | | | | | | | 2 | E López Pérez | 6$^3$ | 6 | 7$^8$ |
| | N Serdarušić | 3 | 2 | 8 | M Viola | 6 | 7$^8$ | | | | | | | | | | |
| | W Trongcharoenchaikul | 7$^7$ | 6 | | W Trongcharoenchaikul | 4 | 6$^6$ | | | | | | | | | | |
| Q | Sidharth Rawat | 6$^3$ | 3 | | | | | | 8 | M Viola | 5 | 6$^4$ | | | | | |
| WC | Congsup Congcar | 5 | 4 | | | | | | 2 | E López Pérez | 7 | 7$^7$ | | | | | |
| | A Bega | 7 | 6 | | A Bega | 3 | 4 | | | | | | | | | | |
| | T Chen | 2 | 3 | 2 | E López Pérez | 6 | 6 | | | | | | | | | | |
| 2 | E López Pérez | 6 | 6 | | | | | | | | | | | | | | |