title: 2018 Gimcheon Open ATP Challenger – Singles
text: # 2018 Gimcheon Open ATP Challenger – Singles
  
  Thomas Fabbiano was the defending champion but chose not to defend his title.
  
  Yoshihito Nishioka won the title after defeating Vasek Pospisil 6–4, 7–5 in the final.
  
  ## Seeds
  
  * Matthew Ebden (first round, retired)
  * Vasek Pospisil (final)
  * Jordan Thompson (second round)
  * Dudi Sela (second round)
  * Lu Yen-hsun (withdrew)
  * Mackenzie McDonald (quarterfinals)
  * Go Soeda (quarterfinals)
  * Jason Jung (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 | Final | Final | Final | Final |
  | - | - | - | - | - | - | - | - |
  | | Max Purcell | 4 | 0 | | | | |
  | Q | Yoshihito Nishioka | 6 | 6 | | | | |
  | Q | Yoshihito Nishioka | 6 | 6 | Q | Yoshihito Nishioka | 6 | 7 |
  | | | | | 2 | Vasek Pospisil | 4 | 5 |
  | | Kwon Soon-woo | 1 | 2 | 2 | Vasek Pospisil | 4 | 5 |
  | 2 | Vasek Pospisil | 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 | Semifinals | Semifinals |
  | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
  | 1 | M Ebden | $7^7$ | 1 | $0^r$ | | | | | | | | | | | | | |
  | | Z Li | $6^5$ | 6 | 3 | | Z Li | 1 | 4 | | | | | | | | | |
  | | B Schnur | $7^8$ | 1 | 3 | | M Purcell | 6 | 6 | | | | | | | | | |
  | | M Purcell | $6^6$ | 6 | 6 | | | | | | | M Purcell | 6 | 6 | | | | |
  | WC | U-s Park | 5 | 2 | | | | | | | 7 | G Soeda | 3 | 3 | | | | |
  | | Y Takahashi | 7 | 6 | | | Y Takahashi | $6^3$ | 2 | | | | | | | | | |
  | | R Statham | 2 | 6 | 4 | 7 | G Soeda | $7^7$ | 6 | | | | | | | | | |
  | 7 | G Soeda | 6 | 3 | 6 | | | | | | | | | | | M Purcell | 4 | 0 |
  | 3 | J Thompson | 6 | 6 | | | | | | | | | | | Q | Y Nishioka | 6 | 6 |
  | WC | Y-s Chung | 4 | 1 | | 3 | J Thompson | 2 | 4 | | | | | | | | | |
  | Q | Y Nishioka | 6 | 6 | | Q | Y Nishioka | 6 | 6 | | | | | | | | | |
  | | J-P Smith | 4 | 0 | | | | | | | Q | Y Nishioka | 6 | 6 | | | | |
  | WC | Lee Young-seok | 1 | 1 | | | | | | | Q | M Ochi | 2 | 2 | | | | |
  | Q | Makoto Ochi | 6 | 6 | | Q | M Ochi | 4 | 6 | $7^7$ | | | | | | | | |
  | WC | D-h Lee | $7^7$ | 2 | 3 | LL | L Saville | 6 | 1 | $6^1$ | | | | | | | | |
  | LL | L Saville | $6^3$ | 6 | 6 | | | | | | | | | | | | | |
  
  ### 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 |
  | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
  | 6 | M McDonald | $7^7$ | $7^7$ | | | | | | | | | | | | | | |
  | | Ze Zhang | $6^4$ | $6^5$ | | 6 | M McDonald | 4 | 6 | 6 | | | | | | | | |
  | | F Peliwo | 6 | 6 | | | F Peliwo | 6 | 3 | 1 | | | | | | | | |
  | | D Wu | 4 | 1 | | | | | | | 6 | M McDonald | 5 | 5 | | | | |
  | | S-w Kwon | 6 | 2 | 6 | | | | | | | S-w Kwon | 7 | 7 | | | | |
  | | D Kelly | 4 | 6 | 2 | | S-w Kwon | 4 | 6 | 6 | | | | | | | | |
  | | M Banes | 3 | 2 | | 4 | D Sela | 6 | 3 | 1 | | | | | | | | |
  | 4 | D Sela | 6 | 6 | | | | | | | | | | | | S-w Kwon | 1 | 2 |
  | 8 | J Jung | 6 | 5 | $7^7$ | | | | | | | | | | 2 | V Pospisil | 6 | 6 |
  | | T Ito | 3 | 7 | $6^4$ | 8 | J Jung | $6^6$ | 0 | | | | | | | | | |
  | Q | Renta Tokuda | 6 | 7 | | Q | R Tokuda | $7^8$ | 6 | | | | | | | | | |
  | Q | W Trongcharoenchaikul | 1 | 5 | | | | | | | Q | R Tokuda | 4 | 4 | | | | |
  | | J Kubler | 6 | 6 | | | | | | | 2 | V Pospisil | 6 | 6 | | | | |
  | | M Giron | 4 | 2 | | | J Kubler | 4 | 4 | | | | | | | | | |
  | | Y Uchiyama | $7^7$ | 2 | 2 | 2 | V Pospisil | 6 | 6 | | | | | | | | | |
  | 2 | V Pospisil | $6^5$ | 6 | 6 | | | | | | | | | | | | | |
  