# 2018 Busan Open – Singles

Vasek Pospisil was the defending champion but lost in the final to Matthew Ebden.
Ebden won the title after defeating Pospisil 7–6$^{(7–4)}$, 6–1 in the final.

## Seeds

* Matthew Ebden (champion)
* Yuki Bhambri (second round)
* Vasek Pospisil (final)
* Dudi Sela (first round)
* Lu Yen-hsun (first round)
* Mackenzie McDonald (quarterfinals)
* Go Soeda (second round)
* Jason Jung (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 |
| 1 | Matthew Ebden | 6 | 6 | | | | | |
| | Filip Peliwo | 3 | 1 | | | | | |
| | Filip Peliwo | 3 | 1 | | 1 | Matthew Ebden | 7$^7$ | 6 |
| | | | | | 3 | Vasek Pospisil | 6$^4$ | 1 |
| 3 | Vasek Pospisil | 6 | 3 | 6 | 3 | Vasek Pospisil | 6$^4$ | 1 |
| Q | Yosuke Watanuki | 3 | 6 | 4 | | | | |

### 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 | M Ebden | 6 | 3 | 6 | | | | | | | | | | | | | | |
| Q | Y-s Chung | 3 | 6 | 3 | 1 | M Ebden | 4 | 7$^7$ | 1 | | | | | | | | | |
| | T Ito | 2 | 7$^{11}$ | 6 | | T Ito | 6 | 6$^1$ | 0$^r$ | | | | | | | | | |
| | Y Uchiyama | 6 | 6$^9$ | 4 | | | | | | 1 | M Ebden | 6 | 6 | | | | | |
| | D Wu | 4 | 6 | 1 | | | | | | 8 | J Jung | 2 | 2 | | | | | |
| | Z Li | 6 | 3 | 6 | | Z Li | 6$^1$ | 7 | 1 | | | | | | | | | |
| | H Moriya | 1 | 1 | | 8 | J Jung | 7$^7$ | 5 | 6 | | | | | | | | | |
| 8 | J Jung | 6 | 6 | | | | | | | | | | | | 1 | M Ebden | 6 | 6 |
| 4 | D Sela | 1 | 4 | | | | | | | | | | | | | F Peliwo | 3 | 1 |
| | F Peliwo | 6 | 6 | | | F Peliwo | 4 | 6 | 6 | | | | | | | | | |
| | Y Takahashi | 2 | 1 | | | D-h Lee | 6 | 2 | 4 | | | | | | | | | |
| | D-h Lee | 6 | 6 | | | | | | | | F Peliwo | 2 | 6 | 7$^8$ | | | | |
| | K Uchida | 6 | 6 | | | | | | | 6 | M McDonald | 6 | 3 | 6$^6$ | | | | |
| WC | Oh Chan-yeong | 1 | 4 | | | K Uchida | 6$^4$ | 3 | | | | | | | | | | |
| | B Schnur | 6 | 2 | 1 | 6 | M McDonald | 7$^7$ | 6 | | | | | | | | | | |
| 6 | M McDonald | 2 | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | G Soeda | 6 | 6 | | | | | | | | | | | | | | | |
| Q | R Statham | 3 | 3 | | 7 | G Soeda | 4 | 4 | | | | | | | | | | |
| WC | Kim Young-seok | 3 | 3 | | | M Giron | 6 | 6 | | | | | | | | | | |
| | M Giron | 6 | 6 | | | | | | | M Giron | 6 | 2 | 4 | | | | | |
| | M Purcell | 6 | 6 | | | | | | 3 | V Pospisil | 3 | 6 | 6 | | | | | |
| WC | J-w Na | 4 | 1 | | | M Purcell | 2 | 3 | | | | | | | | | | |
| Q | M Banes | 7$^7$ | 1 | 5 | 3 | V Pospisil | 6 | 6 | | | | | | | | | | |
| 3 | V Pospisil | 6$^2$ | 6 | 7 | | | | | | | | | | 3 | V Pospisil | 6 | 3 | 6 |
| 5 | Y-h Lu | 1 | 2 | | | | | | | | | | | Q | Yo Watanuki | 3 | 6 | 4 |
| Q | Yo Watanuki | 6 | 6 | | Q | Yo Watanuki | 7$^{13}$ | 6 | | | | | | | | | | |
| WC | S-c Hong | 2 | 4 | | | J-P Smith | 6$^{11}$ | 4 | | | | | | | | | | |
| | J-P Smith | 6 | 6 | | | | | | Q | Yo Watanuki | 4 | 6 | 6 | | | | | |
| | Ze Zhang | 6 | 6 | | | | | | | Ze Zhang | 6 | 4 | 1 | | | | | |
| | D Kelly | 1 | 4 | | | Ze Zhang | 6 | 6 | | | | | | | | | | |
| SE | Y Nishioka | 6 | 6$^6$ | 0$^r$ | 2 | Y Bhambri | 4 | 3 | | | | | | | | | | |
| 2 | Y Bhambri | 3 | 7$^8$ | 3 | | | | | | | | | | | | | | |