| Men's singles | |
|---|---|
| 2023 Hamburg Ladies & Gents Cup | |
| Champion |  Illya Marchenko |
| Runner-up |  Dennis Novak |
| Score | 6–2, 6–3 |
Alexander Ritschard was the defending champion [1] but chose not to defend his title.
Illya Marchenko won the title after defeating Dennis Novak 6–2, 6–3 in the final.
Dennis Novak (final)
Adam Walton (quarterfinals)
Máté Valkusz (quarterfinals)
Rudolf Molleker (first round)
Frederico Ferreira Silva (first round)
Cem İlkel (second round) Maximilian Neuchrist (second round) Oleksii Krutykh (first round)| Semifinals | Final | ||||||||||||
| 1 | Dennis Novak | 4 | 6 | 6 | |||||||||
| Q |  Tristan Lamasine | 6 | 3 | 4 | |||||||||
| 1 | Dennis Novak | 2 | 3 | ||||||||||
| Illya Marchenko | 6 | 6 | |||||||||||
 Billy Harris | 5 | 6 | 5 | ||||||||||
| Illya Marchenko | 7 | 3 | 7 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | D Novak | 77 | 6 | ||||||||||||||||||||||||
| WC | M Topo | 62 | 1 | 1 | D Novak | 6 | 7 | ||||||||||||||||||||
| Q | Lucas Gerch | 3 | 65 |  A Bellier | 3 | 5 | |||||||||||||||||||||
| A Bellier | 6 | 77 | 1 | D Novak | 6 | 6 | |||||||||||||||||||||
| D Added | 2 | 7 | 4 | Q |  J Barranco Cosano | 2 | 2 | ||||||||||||||||||||
| Q | J Barranco Cosano | 6 | 5 | 6 | Q | J Barranco Cosano | 6 | 2 | 6 | ||||||||||||||||||
| G Debru | 6 | 6 | G Debru | 3 | 6 | 4 | |||||||||||||||||||||
| 5 | F Ferreira Silva | 4 | 1 | 1 | D Novak | 4 | 6 | 6 | |||||||||||||||||||
| 4/WC | R Molleker | 3 | 4 | Q | T Lamasine | 6 | 3 | 4 | |||||||||||||||||||
| Q | A Santillan | 6 | 6 | Q | A Santillan | 6 | 7 | ||||||||||||||||||||
 N Gombos | 2 | 5 | WC | M Möller | 4 | 5 | |||||||||||||||||||||
| WC | M Möller | 6 | 7 | Q | A Santillan | 4 | 2 | ||||||||||||||||||||
| Q | T Lamasine | 6 | 6 | Q | T Lamasine | 6 | 6 | ||||||||||||||||||||
| M Guinard | 0 | 0 | Q | T Lamasine | 7 | 6 | |||||||||||||||||||||
 M Echargui | 4 | 4 | 7 | M Neuchrist | 5 | 4 | |||||||||||||||||||||
| 7 | M Neuchrist | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | C İlkel | 6 | 3 | ||||||||||||||||||||||||
| H Laaksonen | 2 | 1r | 6 | C İlkel | 64 | 1 | |||||||||||||||||||||
| N Sánchez Izquierdo | 4 | 2 | B Harris | 77 | 6 | ||||||||||||||||||||||
| B Harris | 6 | 6 | B Harris | 4 | 6 | 6 | |||||||||||||||||||||
 S Napolitano | 1 | 6 | 6 | 3 | M Valkusz | 6 | 0 | 2 | |||||||||||||||||||
| Q | D Masur | 6 | 2 | 4 | S Napolitano | 77 | 4 | 4 | |||||||||||||||||||
 N Serdarušić | 4 | 4 | 3 | M Valkusz | 65 | 6 | 6 | ||||||||||||||||||||
| 3 | M Valkusz | 6 | 6 | B Harris | 5 | 6 | 5 | ||||||||||||||||||||
| 8 | O Krutykh | 2 | 3 | I Marchenko | 7 | 3 | 7 | ||||||||||||||||||||
| I Marchenko | 6 | 6 | I Marchenko | 6 | 3 | 77 | |||||||||||||||||||||
| Q |  M Sasikumar | 5 | 63 | A Çelikbilek | 4 | 6 | 63 | ||||||||||||||||||||
| A Çelikbilek | 7 | 77 | I Marchenko | 6 | 6 | ||||||||||||||||||||||
| Alt |  K Ivanovski | 2 | 4 | 2 | A Walton | 4 | 1 | ||||||||||||||||||||
 J Sels | 6 | 6 | J Sels | 6 | 3 | 3 | |||||||||||||||||||||
| Alt | E Kırkın | 2 | 4 | 2 | A Walton | 3 | 6 | 6 | |||||||||||||||||||
| 2 | A Walton | 6 | 6 | ||||||||||||||||||||||||
Robin Haase was the two-time defending champion, but lost in the semifinals to Marcel Granollers. Granollers went on to win the title, defeating Juan Mónaco in the final, 0–6, 7–6(7–3), 6–4.
Andy Murray was the defending champion, but could not participate this year due to injury.
Cedrik-Marcel Stebe was the defending champion but chose not to defend his title.
Sergiy Stakhovsky was the defending champion but lost in the quarterfinals to Constant Lestienne.
Yuki Bhambri was the defending champion but chose not to defend his title.
Sergiy Stakhovsky was the defending champion but chose not to defend his title.
Matteo Berrettini was the defending champion, but withdrew with an ankle injury before the tournament began.
Stefanos Tsitsipas was the defending champion, but chose not to defend his title.
Gaël Monfils was the defending champion and successfully defended his title, defeating Félix Auger-Aliassime in the final, 6–2, 6–4.
Stefanos Tsitsipas was the defending champion and successfully defended his title, defeating Félix Auger-Aliassime in the final, 6–3, 6–4.
Novak Djokovic won the title, defeating Stefanos Tsitsipas in the final, 6–3, 6–4. Djokovic saved three match points in his semifinal match against Gaël Monfils.
Dennis Novak was the defending champion but chose not to defend his title.
Filip Krajinović was the defending champion but chose not to defend his title.
Nicolás Jarry was the reigning champion from when the tournament was last held in 2019, but chose to not defend his title.
Aslan Karatsev was the defending champion but chose not to defend his title.
Zdeněk Kolář was the defending champion but chose not to defend his title.
Taro Daniel was the defending champion but chose not to defend his title.
Stuart Parker was the defending champion but lost in the qualifying competition to Giovanni Fonio.
Dennis Novak was the defending champion but lost in the semifinals to Arthur Cazaux.
Treat Huey and Max Schnur were the defending champions but chose not to defend their title.