| Singles | |
|---|---|
| 2018 Brasil Open | |
| Champion |  Fabio Fognini |
| Runner-up |  Nicolás Jarry |
| Score | 1–6, 6–1, 6–4 |
| Draw | 28 (4 Q / 3 WC ) |
| Seeds | 8 |
Pablo Cuevas was the three-time defending champion, but lost in the semifinals to Fabio Fognini.
Fognini went on to win the title, defeating Nicolás Jarry in the final, 1–6, 6–1, 6–4.
The top four seeds receive a bye into the second round.
Albert Ramos Viñolas (quarterfinals) Fabio Fognini (champion)
Pablo Cuevas (semifinals)
Gaël Monfils (second round)
Leonardo Mayer (quarterfinals) Guido Pella (second round)
Tennys Sandgren (first round) Federico Delbonis (second round)| Semifinals | Final | ||||||||||||
| Nicolás Jarry | 65 | 6 | 6 | ||||||||||
| Horacio Zeballos | 77 | 4 | 4 | ||||||||||
| Nicolás Jarry | 6 | 1 | 4 | ||||||||||
| 2 | Fabio Fognini | 1 | 6 | 6 | |||||||||
| 3 | Pablo Cuevas | 4 | 2 | ||||||||||
| 2 | Fabio Fognini | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | A Ramos Viñolas | 6 | 6 | ||||||||||||||||||||||||
| Q |  G Clezar | 6 | 1 | 7 | Q | G Clezar | 3 | 4 | |||||||||||||||||||
| WC | T Monteiro | 3 | 6 | 5 | 1 | A Ramos Viñolas | 78 | 4 | 63 | ||||||||||||||||||
| N Jarry | 6 | 1 | 7 | N Jarry | 66 | 6 | 77 | ||||||||||||||||||||
 D Lajović | 4 | 6 | 5 | N Jarry | 62 | 6 | 77 | ||||||||||||||||||||
| WC | C Moutet | 6 | 1 | 2 | 6 | G Pella | 77 | 4 | 62 | ||||||||||||||||||
| 6 | G Pella | 4 | 6 | 6 | N Jarry | 65 | 6 | 6 | |||||||||||||||||||
| H Zeballos | 77 | 4 | 4 | ||||||||||||||||||||||||
| 4 | G Monfils | 3 | 6 | 3 | |||||||||||||||||||||||
| T Bellucci | 62 | 6 | 3 | H Zeballos | 6 | 3 | 6 | ||||||||||||||||||||
| H Zeballos | 77 | 3 | 6 | H Zeballos | 63 | 6 | 6 | ||||||||||||||||||||
| N Kicker | 77 | 6 | R Dutra Silva | 77 | 2 | 4 | |||||||||||||||||||||
 V Estrella Burgos | 65 | 3 | N Kicker | 4 | 2 | ||||||||||||||||||||||
| R Dutra Silva | 6 | 6 | R Dutra Silva | 6 | 6 | ||||||||||||||||||||||
| 7 | T Sandgren | 0 | 4 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | L Mayer | 5 | 712 | 77 | |||||||||||||||||||||||
 G Elias | 7 | 610 | 65 | 5 | L Mayer | 7 | 6 | ||||||||||||||||||||
| C Berlocq | 3 | 6 | 6 | C Berlocq | 5 | 4 | |||||||||||||||||||||
| WC | T Seyboth Wild | 6 | 3 | 2 | 5 | L Mayer | 2 | 715 | 65 | ||||||||||||||||||
| Q |  S Ofner | 6 | 6 | 3 | P Cuevas | 6 | 613 | 77 | |||||||||||||||||||
| M Cecchinato | 3 | 3 | Q | S Ofner | 4 | 64 | |||||||||||||||||||||
| 3 | P Cuevas | 6 | 77 | ||||||||||||||||||||||||
| 3 | P Cuevas | 4 | 2 | ||||||||||||||||||||||||
| 8 | F Delbonis | 6 | 6 | 2 | F Fognini | 6 | 6 | ||||||||||||||||||||
| R Carballés Baena | 4 | 4 | 8 | F Delbonis | 63 | 6 | 4 | ||||||||||||||||||||
| G Melzer | 4 | 6 | 3 | G García López | 77 | 4 | 6 | ||||||||||||||||||||
| G García López | 6 | 3 | 6 | G García López | 4 | 2 | |||||||||||||||||||||
| Q | R Olivo | 6 | 66 | 5 | 2 | F Fognini | 6 | 6 | |||||||||||||||||||
| Q | J Domingues | 2 | 78 | 7 | Q | J Domingues | 5 | 1 | |||||||||||||||||||
| 2 | F Fognini | 7 | 6 | ||||||||||||||||||||||||
Sebastian Ofner (qualified) Tommy Robredo (first round) Renzo Olivo (qualified) João Domingues (qualified) Guilherme Clezar (qualified) João Souza (first round, retired) Daniel Muñoz de la Nava (first round, retired)
Roberto Quiroz (qualifying competition)| First round | Qualifying competition | ||||||||||||
| 1 | Sebastian Ofner | 6 | 6 | ||||||||||
| WC | Rafael Matos | 3 | 4 | ||||||||||
| 1 | Sebastian Ofner | 4 | 6 | 6 | |||||||||
| Pedro Cachin | 6 | 2 | 4 | ||||||||||
| Pedro Cachin | 77 | 4 | |||||||||||
| 7 | Daniel Muñoz de la Nava | 63 | 1r | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 2 | Tommy Robredo | 65 | 4 | ||||||||||
| Pedro Sakamoto | 77 | 6 | |||||||||||
| Pedro Sakamoto | 2 | 1 | |||||||||||
| 5 | Guilherme Clezar | 6 | 6 | ||||||||||
| WC | Fernando Yamacita | 1 | 64 | ||||||||||
| 5 | Guilherme Clezar | 6 | 77 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 3 | Renzo Olivo | 6 | 6 | ||||||||||
 Ivan Gakhov | 4 | 3 | |||||||||||
| 3 | Renzo Olivo | 6 | 77 | ||||||||||
| 8 | Roberto Quiroz | 0 | 65 | ||||||||||
| Daniel Dutra da Silva | 6 | 2 | 3 | ||||||||||
| 8 | Roberto Quiroz | 4 | 6 | 6 | |||||||||
| First round | Qualifying competition | ||||||||||||
| 4 | João Domingues | 6 | 6 | ||||||||||
| José Hernández-Fernández | 2 | 4 | |||||||||||
| 4 | João Domingues | 6 | 6 | ||||||||||
| Ivan Nedelko | 2 | 1 | |||||||||||
| Ivan Nedelko | 77 | 2 | |||||||||||
| 6 | João Souza | 65 | 1r | ||||||||||
Rafael Nadal defeated David Nalbandian in the final, 6–2, 6–3 to win the singles tennis title at the 2013 Brasil Open.
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.
Tommy Robredo was the defending champion, but lost to Pablo Cuevas in the final, 3–6, 4–6.
Pablo Cuevas was the last edition champion, but he chose to defend another of his previous title in Båstad which was held simultaneously with the Croatia Open Umag this year.
Víctor Estrella Burgos was the defending champion and successfully defended his title, defeating Thomaz Bellucci in the final, 4–6, 7–6(7–5), 6–2.
Martin Kližan and Philipp Oswald were the defending champions, but Kližan chose not to participate this year. Oswald played alongside Guillermo Durán, but lost in the first round to Rogério Dutra Silva and João Souza.
Juan Sebastián Cabal and Robert Farah won the title, defeating Pablo Carreño Busta and David Marrero in the final, 7–6(7–5), 6–1.
Rafael Nadal defeated the two-time defending champion Kei Nishikori in the final, 6–4, 7–5 to win the singles title at the 2016 Barcelona Open. It was Nadal's record-extending ninth title at the Barcelona Open and his 49th clay court title, equaling Guillermo Vilas' record for the most titles on clay.
Dominic Thiem was the defending champion, but chose to compete in Kitzbühel instead.
Dominic Thiem was the defending champion, but chose to compete in Rotterdam instead.
Juan Sebastián Cabal and Robert Farah were the defending champions, but lost in the final to Pablo Carreño Busta and Pablo Cuevas, 4–6, 7–5, [8–10].
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.
Horacio Zeballos was the defending champion but chose not to defend his title.
The 2018 Brasil Open was a tennis tournament played on indoor clay courts. It was the 18th edition of the Brasil Open, and part of the ATP World Tour 250 series of the 2018 ATP World Tour. It took place from February 26 through March 4, 2018, in São Paulo, Brazil.
Alexandr Dolgopolov was the defending champion, but withdrew before the tournament began.
Dominic Thiem was the defending champion, but lost in the quarterfinals to Fernando Verdasco.
João Sousa was the defending champion, but lost in the second round to David Goffin.
Fabio Fognini was the defending champion, but he chose to compete in Umag instead.
Nikoloz Basilashvili was the defending champion and successfully defended his title, defeating Andrey Rublev in the final, 7–5, 4–6, 6–3. En route to doing so, Basilashvili saved two match points against Alexander Zverev in the semifinals.
Fabio Fognini was the champion in 2014, when the event was last held, but chose to compete in Dubai instead.
Cameron Norrie defeated Nikoloz Basilashvili in the final, 3–6, 6–4, 6–1 to win the men's singles tennis title at the 2021 Indian Wells Masters. It was his first ATP Tour Masters 1000 title, and he became the first Briton to win the title. Basilashvili became the first Georgian to reach a Masters-level final since Alex Metreveli in 1968, and the first to do so while representing Georgia as an independent nation.