| Singles | |
|---|---|
| 2018 Gwangju Open | |
| Champion |  Maverick Banes |
| Runner-up |  Nam Ji-sung |
| Final score | 6–3, 4–6, 6–4 |
Matthias Bachinger was the defending champion but chose not to defend his title.
Maverick Banes won the title after defeating Nam Ji-sung 6–3, 4–6, 6–4 in the final.
Marcel Granollers (first round)
Henri Laaksonen (first round)
Alexander Bublik (semifinals) Lee Duck-hee (quarterfinals) Akira Santillan (quarterfinals) Maverick Banes (champion)
Ulises Blanch (first round, retired)
Renta Tokuda (quarterfinals, retired)| Semifinals | Final | ||||||||||||
| 6 | Maverick Banes | 6 | 6 | ||||||||||
| Makoto Ochi | 4 | 4 | |||||||||||
| 6 | Maverick Banes | 6 | 4 | 6 | |||||||||
| Q | Nam Ji-sung | 3 | 6 | 4 | |||||||||
| 3 | Alexander Bublik | 67 | 5 | ||||||||||
| Q | Nam Ji-sung | 79 | 7 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/Alt | M Granollers | 4 | 3 | ||||||||||||||||||||||||
| A Popyrin | 6 | 6 | A Popyrin | 77 | 77 | ||||||||||||||||||||||
| B Mousley | 6 | 6 | B Mousley | 65 | 62 | ||||||||||||||||||||||
| Q | Son Ji-hoon | 3 | 2 | A Popyrin | 4 | 3 | |||||||||||||||||||||
| WC | Kim Cheong-eui | 5 | 77 | 2 | 6 | M Banes | 6 | 6 | |||||||||||||||||||
| Q |  Sidharth Rawat | 7 | 65 | 6 | Q | S Rawat | 3 | 3 | |||||||||||||||||||
| WC | Sin Dong-hak | 2 | 1 | 6 | M Banes | 6 | 6 | ||||||||||||||||||||
| 6 | M Banes | 6 | 6 | 6 | M Banes | 6 | 6 | ||||||||||||||||||||
| 4 | D-h Lee | 77 | 6 | M Ochi | 4 | 4 | |||||||||||||||||||||
| WC | Ho Chung | 64 | 2 | 4 | D-h Lee | 6 | 6 | ||||||||||||||||||||
| WC | Jeong Yeong-seok | 4 | 0 |  R Statham | 4 | 3 | |||||||||||||||||||||
| R Statham | 6 | 6 | 4 | D-h Lee | 2 | 1 | |||||||||||||||||||||
 L Catarina | 3 | 2 | M Ochi | 6 | 6 | ||||||||||||||||||||||
| Makoto Ochi | 6 | 6 | M Ochi | 7 | 6 | ||||||||||||||||||||||
| B Ellis | 6 | 0 | B Ellis | 5 | 1 | ||||||||||||||||||||||
| 7 | U Blanch | 3 | 1r | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | Renta Tokuda | 3 | 6 | 6 | |||||||||||||||||||||||
| S Mukund | 6 | 2 | 3 | 8 | R Tokuda | 77 | 6 | ||||||||||||||||||||
 R Safiullin | 6 | 2 | R Safiullin | 63 | 2 | ||||||||||||||||||||||
| Q |  Y He | 2 | 0r | 8 | R Tokuda | 1r | |||||||||||||||||||||
| Y-s Chung | 4 | 6 | 3 | 3 | A Bublik | 3 | |||||||||||||||||||||
 B Lock | 6 | 4 | 6 | B Lock | 2 | 5 | |||||||||||||||||||||
| A Kadhe | 6 | 66 | 62 | 3 | A Bublik | 6 | 7 | ||||||||||||||||||||
| 3 | A Bublik | 4 | 78 | 77 | 3 | A Bublik | 67 | 5 | |||||||||||||||||||
| 5 | A Santillan | 6 | 3 | Q | J-s Nam | 79 | 7 | ||||||||||||||||||||
| G Granollers | 1 | 1r | 5 | A Santillan | 6 | 6 | |||||||||||||||||||||
| Hiroyasu Ehara | 1 | 61 |  K-M Maamoun | 3 | 2 | ||||||||||||||||||||||
| K-M Maamoun | 6 | 77 | 5 | A Santillan | 2 | 3 | |||||||||||||||||||||
| Y Takahashi | 2 | 6 | 2 | Q | J-s Nam | 6 | 6 | ||||||||||||||||||||
| SE | Xia Zihao | 6 | 1 | 6 | SE | Z Xia | 2 | 3 | |||||||||||||||||||
| Q | J-s Nam | 6 | 6 | Q | J-s Nam | 6 | 6 | ||||||||||||||||||||
| 2 | H Laaksonen | 1 | 1 | ||||||||||||||||||||||||
Two-time defending champion Rafael Nadal successfully defended his title, defeating Roger Federer in a rematch of the previous year's final 6–4, 6–4, to win the singles title at the 2007 Monte Carlo Masters.
Bob and Mike Bryan, the two-time defending champions in this event, successfully defended their title. They defeated Mahesh Bhupathi and Leander Paes 6–3, 6–4 in the final.
Yevgeny Kafelnikov was the defending champion and defended his title with 6–4, 6–4 against Magnus Larsson.
Roger Federer was the two-time defending champion and successfully defended his title, defeating Andreas Seppi in the final, 7–6(7–1), 6–4.
Alex Bolt and Andrew Whittington won the title, beating Brydan Klein and Dane Propoggia 7–6(7–2), 6–3
Top seeds Mariusz Fyrstenberg and Santiago González won the title, beating Maverick Banes and Jarryd Chaplin 7–6(7–3), 6–3
Dayne Kelly and Marinko Matosevic were the defending champions but only Kelly defended his title, partnering Christopher O'Connell. Kelly lost in the first round to Jarmere Jenkins and Anderson Reed.
Stan Wawrinka was the defending champion and successfully defended his title, defeating Mischa Zverev in the final, 4–6, 6–3, 6–3.
Jordan Thompson was the defending champion but retired in the second round against Maverick Banes.
This was the first edition of the tournament.
Kevin King was the defending champion but lost in the first round to James Duckworth.
Ante Pavić was the defending champion but chose not to defend his title.
Stéphane Robert was the defending champion but lost in the quarterfinals to Maverick Banes.
Jordan Thompson was the defending champion but chose not to defend his title.
Maverick Banes was the defending champion but lost in the first round to Shintaro Imai.
This was the first edition of the tournament.
Laslo Đere was the defending champion but chose not to defend his title.
Peter Polansky was the defending champion but lost in the semifinals to Yasutaka Uchiyama.
Lloyd Harris was the defending champion but chose not to defend his title.
This was the first edition of the tournament.