| Singles | |
|---|---|
| 2018 Sibiu Open | |
| Champion |  Dragoș Dima |
| Runner-up |  Jelle Sels |
| Score | 6–3, 6–2 |
Cedrik-Marcel Stebe was the defending champion but chose not to defend his title.
Dragoș Dima won the title after defeating Jelle Sels 6–3, 6–2 in the final.
Laslo Đere (semifinals, retired)
Dennis Novak (first round)
Pedro Sousa (quarterfinals)
Simone Bolelli (second round)
Marc Polmans (second round) Gianluigi Quinzi (first round, retired)
Pedro Martínez (semifinals)
Lukáš Rosol (quarterfinals)| Semifinals | Final | ||||||||||||
| 1 | Laslo Đere | 1r | |||||||||||
| Q | Jelle Sels | 0 | |||||||||||
| Q | Jelle Sels | 3 | 2 | ||||||||||
| WC | Dragoș Dima | 6 | 6 | ||||||||||
| 7 | Pedro Martínez | 4 | 2 | ||||||||||
| WC | Dragoș Dima | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | L Đere | 79 | 7 | ||||||||||||||||||||||||
 D Kuzmanov | 67 | 5 | 1 | L Đere | 4 | 6 | 6 | ||||||||||||||||||||
| Alt |  A Šetkić | 5 | 2 |  K Krawietz | 6 | 2 | 2 | ||||||||||||||||||||
| K Krawietz | 7 | 6 | 1 | L Đere | 3 | 6 | 6 | ||||||||||||||||||||
| M Viola | 2 | 77 | 1 | 8 | L Rosol | 6 | 4 | 0 | |||||||||||||||||||
 N Serdarušić | 6 | 60 | 6 | N Serdarušić | 1r | ||||||||||||||||||||||
| G Oliveira | 66 | 3 | 8 | L Rosol | 2 | ||||||||||||||||||||||
| 8 | L Rosol | 78 | 6 | 1 | L Đere | 1r | |||||||||||||||||||||
| 4 | S Bolelli | 6 | 6 | Q | J Sels | 0 | |||||||||||||||||||||
| Q | Jeremy Jahn | 4 | 4 | 4 | S Bolelli | 62 | 3 | ||||||||||||||||||||
| Q | J Sels | 77 | 6 | Q | J Sels | 77 | 6 | ||||||||||||||||||||
| C Gómez-Herrera | 64 | 3 | Q | J Sels | 3 | 6 | 6 | ||||||||||||||||||||
| WC |  Michał Dembek | 5 | 3 | LL | J Barranco Cosano | 6 | 2 | 4 | |||||||||||||||||||
| Z Kolář | 7 | 6 | Z Kolář | 4 | 4 | ||||||||||||||||||||||
| LL | J Barranco Cosano | 77 | 0 | LL | J Barranco Cosano | 6 | 6 | ||||||||||||||||||||
| 6 | G Quinzi | 63 | 0r | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | P Martínez | 77 | 0 | ||||||||||||||||||||||||
| Q | N Frunză | 65 | 0r | 7 | P Martínez | 6 | 6 | ||||||||||||||||||||
| Q | Fabrizio Ornago | 3 | 6 | 77 | Q | F Ornago | 4 | 4 | |||||||||||||||||||
| WC | A Ungur | 6 | 3 | 62 | 7 | P Martínez | 6 | 62 | 6 | ||||||||||||||||||
 F Horanský | 6 | 5 | 4 | 3 | P Sousa | 4 | 77 | 2 | |||||||||||||||||||
 K Coppejans | 2 | 7 | 6 | K Coppejans | 2 | 4 | |||||||||||||||||||||
 S Nagal | 2 | 4 | 3 | P Sousa | 6 | 6 | |||||||||||||||||||||
| 3 | P Sousa | 6 | 6 | 7 | P Martínez | 4 | 2 | ||||||||||||||||||||
| 5 | M Polmans | 7 | 2 | 6 | WC | D Dima | 6 | 6 | |||||||||||||||||||
| S Ofner | 5 | 6 | 3 | 5 | M Polmans | 3 | 4 | ||||||||||||||||||||
| K Majchrzak | 3 | K Majchrzak | 6 | 6 | |||||||||||||||||||||||
| G Mager | 0r | K Majchrzak | 6 | 65 | 3 | ||||||||||||||||||||||
| WC | VV Cornea | 3 | 6 | 0 | WC | D Dima | 0 | 77 | 6 | ||||||||||||||||||
| J Domingues | 6 | 3 | 6 | J Domingues | 6 | 67 | 4 | ||||||||||||||||||||
| WC | D Dima | 6 | 6 | WC | D Dima | 3 | 79 | 6 | |||||||||||||||||||
| 2 | D Novak | 2 | 1 | ||||||||||||||||||||||||
Jack Sock was the defending champion, but participated in the men's main draw, as he was ineligible to defend his title.
Duilio Beretta and Oliver Golding were the defending champions but did not enter this year.
Filip Peliwo was the defending champion, but was no longer eligible to compete in junior tennis, and thus could not defend his title.
Kyle Edmund and Frederico Ferreira Silva were the defending champions, but were not eligible to compete this year.
Guillermo García López was the defending champion, but lost to Lamine Ouahab in the second round.
Martin Kližan won the title, defeating Daniel Gimeno Traver in the final, 6–2, 6–2.
Dominic Thiem was the defending champion, but lost in the quarterfinals to Fernando Verdasco.
Guido Pella was the defending champion but chose not to defend his title.
The men's singles of the 2018 Advantage Cars Prague Open tournament was played on clay in Prague, Czech Republic.
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.
Juan Ignacio Londero was the defending champion, but lost to Laslo Đere in the quarterfinals.
Casper Ruud became the first Norwegian to win an ATP title, defeating Pedro Sousa in the final, 6–1, 6–4.
Albert Ramos Viñolas defeated Cameron Norrie in the final, 4–6, 6–3, 7–6(7–3) to win the singles tennis title at the 2021 Estoril Open. It marked his third career ATP Tour singles title, all of which have been on clay. Norrie was aiming to win his first ATP Tour title in his second final.
Luca Van Assche won the title, defeating Arthur Fils in an all-French final, 6–4, 6–2. This was the first Grand Slam junior tournament with all-French semifinalists.
Alejandro Davidovich Fokina was the defending champion but chose not to defend his title.
Jannik Sinner was the defending champion and successfully defended his title, defeating Gaël Monfils in the final, 6–3, 6–4.
Pedro Martínez defeated Sebastián Báez in the final, 4–6, 6–4, 6–4 to win the singles title at the 2022 Chile Open. It was his first ATP Tour title.
Gianluca Mager was the defending champion but chose not to defend his title.
Holger Rune was the defending champion but chose not to defend his title.
Francisco Cerúndolo defeated Sebastián Báez in the final, 7–6(7–4), 6–2 to win the men's singles tennis title at the 2022 Swedish Open. It was his maiden ATP Tour title.
Juan Pablo Varillas was the defending champion but lost in the first round to Thiago Agustín Tirante.