| Singles | |
|---|---|
| 2018 Sparkassen Open | |
| Champion |  Yannick Hanfmann |
| Runner-up |  Jozef Kovalík |
| Final score | 6–2, 3–6, 6–3 |
Nicola Kuhn was the defending champion but lost in the first round to Yannick Hanfmann.
Hanfmann won the title after defeating Jozef Kovalík 6–2, 3–6, 6–3 in the final.
Pablo Cuevas (quarterfinals)
Roberto Carballés Baena (quarterfinals) Jaume Munar (first round) Florian Mayer (first round)
Radu Albot (withdrew)
Jürgen Zopp (second round) Yannick Hanfmann (champion) Martin Kližan (first round) Jozef Kovalík (final)| Semifinals | Final | ||||||||||||
| 9 | Jozef Kovalík | 6 | 6 | ||||||||||
| Alt |  Arthur De Greef | 2 | 3 | ||||||||||
| 9 | Jozef Kovalík | 2 | 6 | 3 | |||||||||
| 7 | Yannick Hanfmann | 6 | 3 | 6 | |||||||||
 Andrea Arnaboldi | 4 | 2 | |||||||||||
| 7 | Yannick Hanfmann | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | P Cuevas | 6 | 77 | ||||||||||||||||||||||||
| Q |  M Janvier | 3 | 64 | 1 | P Cuevas | 6 | 6 | ||||||||||||||||||||
| Q | Marvin Netuschil | 6 | 6 | Q | M Netuschil | 3 | 3 | ||||||||||||||||||||
| LL |  D Dima | 3 | 1 | 1 | P Cuevas | 61 | 3 | ||||||||||||||||||||
| WC | D Masur | 6 | 7 | 9 | J Kovalík | 77 | 6 | ||||||||||||||||||||
| S Travaglia | 4 | 5 | WC | D Masur | 2 | 2 | |||||||||||||||||||||
 R Quiroz | 1 | 0 | 9 | J Kovalík | 6 | 6 | |||||||||||||||||||||
| 9 | J Kovalík | 6 | 6 | 9 | J Kovalík | 6 | 6 | ||||||||||||||||||||
| 4 | F Mayer | 61 | 6 | 2 | Alt | A De Greef | 2 | 3 | |||||||||||||||||||
| Alt | A De Greef | 77 | 2 | 6 | Alt | A De Greef | 6 | 77 | |||||||||||||||||||
 A Vatutin | 68 | 5 |  R Dutra Silva | 4 | 65 | ||||||||||||||||||||||
| R Dutra Silva | 710 | 7 | Alt | A De Greef | 6 | 6 | |||||||||||||||||||||
| T Kamke | 1 | 3 |  H Dellien | 4 | 1 | ||||||||||||||||||||||
| H Dellien | 6 | 6 | H Dellien | 6 | 3 | 6 | |||||||||||||||||||||
| WC | R Molleker | 7 | 3 | 4 | 6 | J Zopp | 2 | 6 | 1 | ||||||||||||||||||
| 6 | J Zopp | 5 | 6 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | M Kližan | 6 | 0 | 4 | |||||||||||||||||||||||
| Alt | M Cuevas | 3 | 6 | 6 | Alt | M Cuevas | 4 | 6 | 4 | ||||||||||||||||||
| M Moraing | 6 | 6 | M Moraing | 6 | 2 | 6 | |||||||||||||||||||||
| Q | K Coppejans | 2 | 1 | M Moraing | 2 | 0r | |||||||||||||||||||||
| A Arnaboldi | 7 | 4 | 7 | A Arnaboldi | 6 | 0 | |||||||||||||||||||||
 S Ofner | 5 | 6 | 5 | A Arnaboldi | 6 | 4 | 6 | ||||||||||||||||||||
| Q |  J Šátral | 6 | 2 | 6 | Q | J Šátral | 4 | 6 | 4 | ||||||||||||||||||
| 3 | J Munar | 4 | 6 | 3 | A Arnaboldi | 4 | 2 | ||||||||||||||||||||
| 7 | Y Hanfmann | 6 | 6 | 7 | Y Hanfmann | 6 | 6 | ||||||||||||||||||||
| WC | N Kuhn | 1 | 3 | 7 | Y Hanfmann | 3 | 77 | 6 | |||||||||||||||||||
 V Galović | 3 | 62 | D Brown | 6 | 65 | 2 | |||||||||||||||||||||
| D Brown | 6 | 77 | 7 | Y Hanfmann | 4 | 6 | 6 | ||||||||||||||||||||
| WC | T Bellucci | 3 | 4 | 2 | R Carballés Baena | 6 | 4 | 2 | |||||||||||||||||||
| Y Maden | 6 | 6 | Y Maden | 6 | 2 | 5 | |||||||||||||||||||||
 C Ruud | 2 | 7 | 63 | 2 | R Carballés Baena | 4 | 6 | 7 | |||||||||||||||||||
| 2 | R Carballés Baena | 6 | 5 | 77 | |||||||||||||||||||||||
Andy Murray was the defending champion, but chose not to participate this year.
This was the first edition of the tournament.
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.
Philipp Kohlschreiber was the defending champion, but lost in the second round to Horacio Zeballos.
Santiago Giraldo was the defending champion but chose not to defend his title.
Feliciano López was the defending champion, but lost in the second round to Yannick Hanfmann.
Tomáš Berdych was the two-time defending champion, but withdrew before the competition began.
Grigor Dimitrov was the defending champion, but lost in the semifinals to Nick Kyrgios.
Marco Cecchinato was the defending champion but chose not to defend his title.
Ričardas Berankis was the defending champion but chose not to defend his title.
Fabio Fognini was the defending champion, but lost in the second round to Jürgen Zopp.
Philipp Kohlschreiber was the defending champion, but lost in the second round to Denis Istomin.
Aljaž Bedene was the defending champion but chose not to defend his title.
Guido Andreozzi was the defending champion but chose not to defend his title.
Guido Pella was the defending champion but chose not to defend his title.
Andrea Collarini was the defending champion but lost in the first round to Marco Cecchinato.
Dominic Thiem was the defending champion and chose not to defend his title, as he was still competing at the 2020 US Open.
Thiago Monteiro was the defending champion but chose not to defend his title.
Jozef Kovalík was the defending champion but chose not to defend his title.
Gero Kretschmer and Alexander Satschko were the defending champions but chose not to defend their title.