| Men's doubles | |
|---|---|
| 2023 Hamburg Ladies & Gents Cup | |
| Champions |  Dennis Novak  Akira Santillan |
| Runners-up |  Alexandru Jecan  Mick Veldheer |
| Score | 6–4, 3–6, [10–3] |
Treat Huey and Max Schnur were the defending champions [1] but chose not to defend their title.
Dennis Novak and Akira Santillan won the title after defeating Alexandru Jecan and Mick Veldheer 6–4, 3–6, [10–3] in the final.
Dan Added / 
Jakub Paul (quarterfinals)
Hunter Reese / Adam Walton (quarterfinals) Alexandru Jecan / Mick Veldheer (final)
Billy Harris / 
Kelsey Stevenson (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | D Added J Paul | 6 | 6 | ||||||||||||||||||||||||
| Mats Hermans J Sels | 4 | 3 | 1 | D Added J Paul | 6 | 5 | [7] | ||||||||||||||||||||
 C İlkel E Kırkın | 1 | 2 | WC |  J Schnaitter M Wallner | 4 | 7 | [10] | ||||||||||||||||||||
| WC | J Schnaitter M Wallner | 6 | 6 | WC | J Schnaitter M Wallner | 711 | 5 | [8] | |||||||||||||||||||
| 3 | A Jecan M Veldheer | 78 | 3 | [10] | 3 | A Jecan M Veldheer | 69 | 7 | [10] | ||||||||||||||||||
 J Barranco Cosano D Jordà Sanchis | 66 | 6 | [8] | 3 | A Jecan M Veldheer | 6 | 5 | [10] | |||||||||||||||||||
| D Masur L Wessels | 6 | 6 | D Masur L Wessels | 2 | 7 | [5] | |||||||||||||||||||||
 M Bašić  N Serdarušić | 3 | 4 | 3 | A Jecan M Veldheer | 4 | 6 | [3] | ||||||||||||||||||||
 H Habib  Parikshit Somani | 6 | 6 | D Novak A Santillan | 6 | 3 | [10] | |||||||||||||||||||||
| S Ağabigün A Çelikbilek | 4 | 3 | H Habib P Somani | 4 | 66 | ||||||||||||||||||||||
 D Istomin  E Karlovskiy | 77 | 6 | D Istomin E Karlovskiy | 6 | 78 | ||||||||||||||||||||||
| 4 | B Harris K Stevenson | 64 | 3 | D Istomin E Karlovskiy | |||||||||||||||||||||||
| D Novak A Santillan | 6 | 6 | D Novak A Santillan | w/o | |||||||||||||||||||||||
| WC | Tuncay Duran Noel Larwig | 0 | 4 | D Novak A Santillan | 6 | 77 | |||||||||||||||||||||
 O Krutykh R Molleker | 2 | H Reese A Walton | 1 | 63 | |||||||||||||||||||||||
| 2 | H Reese A Walton | w/o | |||||||||||||||||||||||||
Jérémy Chardy was the defending champion, but was no longer eligible to compete in the juniors.
Rameez Junaid and Philipp Oswald were the defending champions, but both players chose not to participate.
Italians Marco Cecchinato and Matteo Viola were the defending champions, but they did not participate this year.
Victor Crivoi and Petru-Alexandru Luncanu were the defending champions but only Luncanu decided to defend his title, partnering Kamil Majchrzak. Luncanu lost in the first round to Jonathan Eysseric and Tristan Lamasine.
Graeme Dyce and Harri Heliövaara won the title by defeating Stephen Donald and Rupesh Roy 6–2, 6–7(4–7), 6–3 in the final.
Emiliano Massa and Kei Nishikori won the title, defeating Artur Chernov and Valery Rudnev in the final, 2–6, 6–1, 6–2.
Denys Molchanov and Igor Zelenay were the defending champions but chose not to defend their title.
Samir Banerjee was the defending champion, but was no longer eligible to participate in junior events.
Victor Vlad Cornea and Andrew Paulson were the defending champions but only Paulson chose to defend his title, partnering Petr Nouza. Paulson successfully defended his title after defeating Filip Bergevi and Mick Veldheer 7–5, 6–3 in the final.
Alexander Erler and Lucas Miedler were the defending champions but chose not to defend their title.
Vít Kopřiva and Jaroslav Pospíšil were the defending champions but chose not to defend their title.
Zdeněk Kolář and Gonçalo Oliveira were the defending champions but only Kolář chose to defend his title, partnering Karol Drzewiecki. Kolář successfully defended his title after defeating Jaime Faria and Henrique Rocha 6–2, 7–6(7–5) in the final.
The 2023 Hamburg Ladies & Gents Cup was a professional tennis tournament played on indoor hard courts. It was the fourth edition of the tournament which was part of the 2023 ATP Challenger Tour and the 2023 ITF Women's World Tennis Tour. It took place in Hamburg, Germany between 16 and 22 October 2023.
Denis Istomin and Evgeny Karlovskiy were the defending champions but withdrew from their quarterfinals match against Daniel Cukierman and Joshua Paris.
Oleksii Krutykh and Oriol Roca Batalla were the defending champions but chose to defend their title with different partners. Krutykh partnered Sumit Nagal but lost in the first round to Marco Bortolotti and Alexandru Jecan. Roca Batalla partnered Daniel Rincón but lost in the final to Andrea Pellegrino and Andrea Vavassori.
Victor Vlad Cornea and Ruben Gonzales were the defending champions but only Gonzales chose to defend his title, partnering Chung Yun-seong. Gonzales lost in the semifinals to Ray Ho and Calum Puttergill.
This was the first edition of the tournament.
Harri Heliövaara and Roman Jebavý were the defending champions but chose not to defend their title.
Jacopo Berrettini and Flavio Cobolli were the defending champions but chose not to defend their title.
Sadio Doumbia and Fabien Reboul were the defending champions but chose not to defend their title.