| Singles | |
|---|---|
| 2018 Banja Luka Challenger | |
| Champion |  Alessandro Giannessi |
| Runner-up |  Carlos Berlocq |
| Score | 6–7(6–8), 6–4, 6–4 |
Maximilian Marterer was the defending champion but chose not to defend his title.
Alessandro Giannessi won the title after defeating Carlos Berlocq 6–7(6–8), 6–4, 6–4 in the final.
Juan Ignacio Londero (quarterfinals)
Pablo Andújar (quarterfinals) Marco Trungelliti (first round) Daniel Gimeno Traver (quarterfinals)
Andrej Martin (first round)
Christian Garín (second round, withdrew) Carlos Berlocq (final) Pedro Martínez (first round)| Semifinals | Final | ||||||||||||
| Filippo Baldi | 63 | 4 | |||||||||||
| Alessandro Giannessi | 77 | 6 | |||||||||||
| Alessandro Giannessi | 66 | 6 | 6 | ||||||||||
| 7 | Carlos Berlocq | 78 | 4 | 4 | |||||||||
 Johan Tatlot | 2 | 4 | |||||||||||
| 7 | Carlos Berlocq | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | JI Londero | 5 | 6 | 5 | |||||||||||||||||||||||
| Q |  A Karatsev | 7 | 3 | 3r | 1 | JI Londero | 6 | 6 | |||||||||||||||||||
| Q | F Coria | 6 | 6 | Q | F Coria | 4 | 2 | ||||||||||||||||||||
 K Krawietz | 3 | 1 | 1 | JI Londero | 6 | 0 | 5 | ||||||||||||||||||||
| F Baldi | 6 | 6 | F Baldi | 4 | 6 | 7 | |||||||||||||||||||||
 K Coppejans | 1 | 4 | F Baldi | w/o | |||||||||||||||||||||||
| WC |  Kento Tagashira | 0 | 1 | 6 | C Garín | ||||||||||||||||||||||
| 6 | C Garín | 6 | 6 | F Baldi | 63 | 4 | |||||||||||||||||||||
| 3 | M Trungelliti | 3 | 3 | A Giannessi | 77 | 6 | |||||||||||||||||||||
 L Grigelis | 6 | 6 | L Grigelis | 2 | 77 | 6 | |||||||||||||||||||||
| SE |  T Bellucci | 77 | 6 | SE | T Bellucci | 6 | 65 | 3 | |||||||||||||||||||
| P Cachin | 62 | 1 | L Grigelis | 3 | 4 | ||||||||||||||||||||||
 D Kuzmanov | 6 | 77 | A Giannessi | 6 | 6 | ||||||||||||||||||||||
 A Pavić | 1 | 60 | D Kuzmanov | 6 | 2 | 2 | |||||||||||||||||||||
| A Giannessi | 6 | 4 | 6 | A Giannessi | 2 | 6 | 6 | ||||||||||||||||||||
| 5 | A Martin | 4 | 6 | 4 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | P Martínez | 3 | 4 | ||||||||||||||||||||||||
| J Tatlot | 6 | 6 | J Tatlot | 6 | 6 | ||||||||||||||||||||||
| Q | A Lazov | 6 | 6 | Q | A Lazov | 3 | 4 | ||||||||||||||||||||
| WC | Franjo Raspudić | 4 | 1 | J Tatlot | 4 | 7 | 7 | ||||||||||||||||||||
| R Ojeda Lara | 6 | 6 | 4 | D Gimeno Traver | 6 | 5 | 5 | ||||||||||||||||||||
| WC |  M Zekić | 4 | 4 | R Ojeda Lara | 4 | 2 | |||||||||||||||||||||
| F Horanský | 1 | 62 | 4 | D Gimeno Traver | 6 | 6 | |||||||||||||||||||||
| 4 | D Gimeno Traver | 6 | 77 | J Tatlot | 2 | 4 | |||||||||||||||||||||
| 7 | C Berlocq | 6 | 6 | 7 | C Berlocq | 6 | 6 | ||||||||||||||||||||
| WC | M Miladinović | 2 | 1 | 7 | C Berlocq | 6 | 6 | ||||||||||||||||||||
| O Roca Batalla | 6 | 6 | O Roca Batalla | 4 | 4 | ||||||||||||||||||||||
| I Nedelko | 0 | 4 | 7 | C Berlocq | 3 | 6 | 6 | ||||||||||||||||||||
| B Zapata Miralles | 6 | 6 | 2 | P Andújar | 6 | 4 | 1 | ||||||||||||||||||||
| G Mager | 4 | 1 | B Zapata Miralles | 4 | 5 | ||||||||||||||||||||||
| Q | A Vavassori | 0 | 1 | 2 | P Andújar | 6 | 7 | ||||||||||||||||||||
| 2 | P Andújar | 6 | 6 | ||||||||||||||||||||||||
Carlos Moyá was the defending champion, but was eliminated in the round robin competition.
Gastón Gaudio was the defending champion, but lost in the second round this year.
Simone Bolelli was the champion in 2010, but chose not to defend his title.
Diego Junqueira is the defending champion, but lost in the quarterfinals.
Carlos Berlocq won the title, defeating Gastão Elias 6–1, 7–6(7–3) in the final.
Tommy Robredo was the defending champion but withdrew due to leg injury.
Nicolás Almagro defended his title by defeating Filippo Volandri 6–3, 4–6, 6–4 in the final.
Alexandr Dolgopolov was the defending champion but lost in the semifinals to Marin Čilić, who won the title by beating Marcel Granollers 6–4, 6–2 in the final.
Horacio Zeballos defeated Rafael Nadal in the final, 6–7(2–7), 7–6(8–6), 6–4 to win the singles tennis title at the 2013 Chile Open. It was Nadal's first tournament in eight months.
Carlos Berlocq was the defending champion, but lost to João Sousa in the semifinals.
Pablo Cuevas won his first ATP World Tour title, defeating Sousa in the final, 6–2, 6–1.
Facundo Argüello was the defending champion, but lost in the quarterfinals to Guido Andreozzi.
Jack Sock was the defending champion, but lost in the final to Juan Mónaco, 6–3, 3–6, 5–7.
Roger Federer was the defending champion, but chose not to participate this year.
Mathias Bourgue was the defending champion, but lost in the first round to Scott Griekspoor.
Nicolás Almagro and Carlos Berlocq were the defending champions, but Almagro chose not to participate this year and Berlocq chose to compete in Umag instead.
Facundo Argüello was the defending champion but chose not to defend his title.
Pablo Cuevas was the two-time defending champion and successfully defended his title, defeating Albert Ramos Viñolas in the final, 6–7(3–7), 6–4, 6–4.
Defending champion Rafael Nadal defeated Albert Ramos Viñolas in the final, 6–1, 6–3 to win the singles tennis title at the 2017 Monte-Carlo Masters. It was his record-extending 10th Monte Carlo Masters title, becoming the first man in the Open Era to win 10 singles titles at the same tournament. Nadal also claimed his Open Era record 50th clay court title.
Alexander Zverev defeated Novak Djokovic in the final, 6–4, 6–3 to win the men's singles tennis title at the 2017 Italian Open. It was his first Masters 1000 title, and he became the first player born in the 1990s to win a Masters title.
Dominic Thiem was the defending champion, but lost in the quarterfinals to Fernando Verdasco.
Leonardo Mayer was the defending champion, but lost in the final to Nikoloz Basilashvili, 4–6, 6–0, 5–7. This was Basilashvili's first ATP World Tour title, as well as the first ATP title won by a Georgian player since Alexander Metreveli.