# 2009 Busan Open Challenger Tennis – Singles

Go Soeda was the defending champion but lost to his compatriot Yuichi Sugita in the first round. Danai Udomchoke became the new champion after his win against Blaž Kavčič in the final (6–2, 6–2).

## Seeds

* Go Soeda (first round)
* Danai Udomchoke (champion)
* Florian Mayer (semifinals)
* Im Kyu-tae (semifinals)
* Kristian Pless (first round)
* Marco Chiudinelli (second round)
* Samuel Groth (quarterfinals)
* Blaž Kavčič (final)

## 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

### Final four

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 8 | Blaž Kavčič | 6 | 7 | | | | |
| 4 | Im Kyu-tae | 2 | 5 | | | | |
| 4 | Im Kyu-tae | 2 | 5 | 8 | Blaž Kavčič | 2 | 2 |
| | | | | 2 | Danai Udomchoke | 6 | 6 |
| 3 | Florian Mayer | 1 | 1 | 2 | Danai Udomchoke | 6 | 6 |
| 2 | Danai Udomchoke | 6 | 6 | | | | |

### Top 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 |
| 1 | G Soeda | 4 | 4 | | | | | | | | | | | | | | |
| | Y Sugita | 6 | 6 | | | Y Sugita | 5 | 3 | | | | | | | | | |
| | T Matsui | 6 | 4 | 6 | | T Matsui | 7 | 6 | | | | | | | | | |
| | J Minář | 3 | 6 | 4 | | | | | | T Matsui | 1 | 2 | | | | | |
| | C Eaton | 6 | 6 | | | | | | 8 | B Kavčič | 6 | 6 | | | | | |
| Q | S-Y Kim Jr. | 4 | 3 | | | C Eaton | 2 | 4 | | | | | | | | | |
| WC | Y B Seo | 2 | 1 | | 8 | B Kavčič | 6 | 6 | | | | | | | | | |
| 8 | B Kavčič | 6 | 6 | | | | | | | | | | | 8 | B Kavčič | 6 | 7 |
| 4 | K-t Im | 6 | 6$^9$ | 6 | | | | | | | | | | 4 | K-t Im | 2 | 5 |
| | T Chen | 2 | 7 | 1 | 4 | K-t Im | 6 | 7 | | | | | | | | | |
| | J Mitsuhashi | 3 | 4 | | WC | J-S An | 2 | 5 | | | | | | | | | |
| WC | J-S An | 6 | 6 | | | | | | 4 | K-t Im | 6 | 4 | 6 | | | | |
| | M Semjan | 3 | 4 | | | | | | | A-u-H Qureshi | 4 | 6 | 3 | | | | |
| | A-u-H Qureshi | 6 | 6 | | | A-u-H Qureshi | 7 | 6 | | | | | | | | | |
| | T Iwami | 6 | 6 | | | T Iwami | 6$^5$ | 4 | | | | | | | | | |
| 5 | K Pless | 3 | 4 | | | | | | | | | | | | | | |

### 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 |
| 6 | M Chiudinelli | 6 | 6 | | | | | | | | | | | | | | |
| Q | G Motomura | 2 | 1 | | 6 | M Chiudinelli | 4 | 4 | | | | | | | | | |
| | L Lacko | 6 | 6 | | | L Lacko | 6 | 6 | | | | | | | | | |
| Q | S-J Cho | 2 | 4 | | | | | | | L Lacko | 2 | 3 | | | | | |
| Q | H Kondo | 2 | 2 | | | | | | 3 | F Mayer | 6 | 6 | | | | | |
| | A Juška | 6 | 6 | | | A Juška | 2 | 1 | | | | | | | | | |
| | W-S Jun | 4 | 0 | | 3 | F Mayer | 6 | 6 | | | | | | | | | |
| 3 | F Mayer | 6 | 6 | | | | | | | | | | | 3 | F Mayer | 1 | 1 |
| 7 | S Groth | 4 | 7 | 6 | | | | | | | | | | 2 | D Udomchoke | 6 | 6 |
| | D Lojda | 6 | 5 | 1 | 7 | S Groth | 6 | 6 | | | | | | | | | |
| | K Čapkovič | 6 | 7 | | | K Čapkovič | 3 | 2 | | | | | | | | | |
| WC | Y-K Lim | 1 | 5 | | | | | | 7 | S Groth | 6 | 3 | 4 | | | | |
| | G Panfil | 6 | 6$^5$ | 5 | | | | | 2 | D Udomchoke | 3 | 6 | 6 | | | | |
| WC | SY Jeong | 4 | 7 | 7 | WC | SY Jeong | 1 | 0 | | | | | | | | | |
| | T Ito | 6 | 2 | 3 | 2 | D Udomchoke | 6 | 6 | | | | | | | | | |
| 2 | D Udomchoke | 3 | 6 | 6 | | | | | | | | | | | | | |