| Singles | |
|---|---|
| 2024 Koblenz Open | |
| Champion |  Jurij Rodionov |
| Runner-up |  Brandon Nakashima |
| Score | 6–7(7–9), 6–1, 6–2 |
Roman Safiullin was the defending champion [1] but chose not to defend his title.
Jurij Rodionov won the title after defeating Brandon Nakashima 6–7(7–9), 6–1, 6–2 in the final.
Jurij Rodionov (champion) Brandon Nakashima (final)
Jan Choinski (withdrew)
Lloyd Harris (first round)
Zdeněk Kolář (quarterfinals)
Mattia Bellucci (first round)
Rudolf Molleker (quarterfinals) Francesco Passaro (withdrew)| Semifinals | Final | ||||||||||||
| 1 | Jurij Rodionov | 6 | 6 | ||||||||||
| Stefano Travaglia | 3 | 4 | |||||||||||
| 1 | Jurij Rodionov | 67 | 6 | 6 | |||||||||
| 2 | Brandon Nakashima | 79 | 1 | 2 | |||||||||
| Q |  Hazem Naw | 3 | 5 | ||||||||||
| 2 | Brandon Nakashima | 6 | 7 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | J Rodionov | 6 | 6 | ||||||||||||||||||||||||
| D Novak | 1 | 1 | 1 | J Rodionov | 77 | 6 | |||||||||||||||||||||
 V Royer | 63 | 6 | 6 | V Royer | 64 | 1 | |||||||||||||||||||||
| Q |  D Michalski | 77 | 4 | 2 | 1 | J Rodionov | 6 | 7 | |||||||||||||||||||
 A Blockx | 3 | 6 | 77 | 7 | R Molleker | 3 | 5 | ||||||||||||||||||||
| G Mpetshi Perricard | 6 | 3 | 63 | A Blockx | 3 | 0 | |||||||||||||||||||||
| Q |  M Kližan | 0 | 2 | 7 | R Molleker | 6 | 6 | ||||||||||||||||||||
| 7 | R Molleker | 6 | 6 | 1 | J Rodionov | 6 | 6 | ||||||||||||||||||||
| LL | F Agamenone | 4 | 5 | S Travaglia | 3 | 4 | |||||||||||||||||||||
| S Travaglia | 6 | 7 | S Travaglia | 6 | 6 | ||||||||||||||||||||||
| WC | H Squire | 4 | 4 | J Marie | 1 | 1 | |||||||||||||||||||||
| Jules Marie | 6 | 6 | S Travaglia | 3 | 6 | 79 | |||||||||||||||||||||
| M Janvier | 4 | 1 | M Damm | 6 | 3 | 67 | |||||||||||||||||||||
 M Kukushkin | 6 | 6 | M Kukushkin | 61 | 7 | 63 | |||||||||||||||||||||
| M Damm | 6 | 6 | M Damm | 77 | 5 | 77 | |||||||||||||||||||||
| 6 | M Bellucci | 3 | 3 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | Z Kolář | 6 | 6 | ||||||||||||||||||||||||
| Q | C Broom | 4 | 2 | 5 | Z Kolář | 6 | 77 | ||||||||||||||||||||
| WC | Tom Gentzsch | 0 | 2 | Q | T Lamasine | 3 | 63 | ||||||||||||||||||||
| Q | T Lamasine | 6 | 6 | 5 | Z Kolář | 2 | 4 | ||||||||||||||||||||
| B Harris | 5 | 5 | Q | H Naw | 6 | 6 | |||||||||||||||||||||
| Q | H Naw | 7 | 7 | Q | H Naw | 2 | 77 | 6 | |||||||||||||||||||
| Alt | O Otte | 5 | 6 | 6 | Alt | O Otte | 6 | 63 | 4 | ||||||||||||||||||
| 4 | L Harris | 7 | 1 | 4 | Q | H Naw | 3 | 5 | |||||||||||||||||||
| LL |  D Jordà Sanchis | 6 | 3 | 6 | 2 | B Nakashima | 6 | 7 | |||||||||||||||||||
 I Marchenko | 4 | 6 | 1 | LL | D Jordà Sanchis | 66 | 4 | ||||||||||||||||||||
| R Brancaccio | 79 | 1 | 2 | WC | MH Rehberg | 78 | 6 | ||||||||||||||||||||
| WC | MH Rehberg | 67 | 6 | 6 | WC | MH Rehberg | 3 | 4 | |||||||||||||||||||
| R Peniston | 3 | 6 | 4 | 2 | B Nakashima | 6 | 6 | ||||||||||||||||||||
| Q |  F Krajinović | 6 | 4 | 6 | Q | F Krajinović | 65 | 4 | |||||||||||||||||||
| A Moro Cañas | 1 | 2 | 2 | B Nakashima | 77 | 6 | |||||||||||||||||||||
| 2 | B Nakashima | 6 | 6 | ||||||||||||||||||||||||
Jurij Rodionov was the defending champion but chose not to defend his title.
Marco Trungelliti was the defending champion but chose not to defend his title.
Yannick Hanfmann was the defending champion but chose not to defend his title.
Roman Safiullin was the defending champion but chose not to defend his title.
There was no defending champion as the last edition of the tournament was canceled due to the COVID-19 pandemic.
Lorenzo Sonego defeated defending champion Laslo Đere in the final, 2–6, 7–6(7–5), 6–4 to win the men's singles title at the 2021 Sardegna Open. With the victory, Sonego became the first Italian in 15 years to capture an ATP Tour title on home soil.
Jannik Sinner was the defending champion and successfully defended his title, defeating Gaël Monfils in the final, 6–3, 6–4.
Sebastian Korda was the defending champion but chose not to defend his title.
Brandon Nakashima was the defending champion but chose not to participate.
Reilly Opelka defeated Jenson Brooksby in the final, 7–6(7–5), 7–6(7–3) to win the singles title at the 2022 Dallas Open. This was the first edition of the tournament.
Cameron Norrie defeated Reilly Opelka in the final, 7–6(7–1), 7–6(7–4) to win the singles title at the 2022 Delray Beach Open.
Andrey Rublev defeated Félix Auger-Aliassime in the final, 7–5, 7–6(7–4) to win the singles title at the 2022 Open 13 Provence.
Liam Broady was the defending champion but chose not to defend his title.
Dominik Koepfer was the defending champion but chose not to defend his title.
Alex Molčan was the defending champion but chose not to defend his title.
Ugo Humbert was the defending champion but chose not to defend his title.
Defending champion Carlos Alcaraz defeated Jan-Lennard Struff in the final, 6–4, 3–6, 6–3 to win the men's singles tennis title at the 2023 Madrid Open. It was his fourth Masters 1000 title. Struff was the first lucky loser to reach a Masters final.
Ben Shelton defeated Aslan Karatsev in the final, 7–5, 6–1 to win the singles tennis title at the 2023 Japan Open. It was his first ATP Tour title. He and his father Bryan Shelton became the fourth father-son duo in the Open Era to win tour-level singles titles.
David Goffin was the defending champion but lost in the second round to Abdullah Shelbayh.
Luca Van Assche was the defending champion but chose not to defend his title.