| Men's doubles | |
|---|---|
| 2023 Keio Challenger | |
| 2022 Champions |  Victor Vlad Cornea  Ruben Gonzales |
Victor Vlad Cornea and Ruben Gonzales were the defending champions [1] but only Gonzales chose to defend his title, partnering Chung Yun-seong. Gonzales lost in the semifinals to Ray Ho and Calum Puttergill.
Evan King / Reese Stalder (quarterfinals)
Andrew Harris / 
Nam Ji-sung (quarterfinals)
Karol Drzewiecki / 
Zdeněk Kolář (quarterfinals)
Rithvik Choudary Bollipalli / Arjun Kadhe (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | E King R Stalder | 6 | 6 | ||||||||||||||||||||||||
 C Sinclair  A Sitak | 2 | 2 | 1 | E King R Stalder | 3 | 4 | |||||||||||||||||||||
 F Bergevi  Mick Veldheer | 6 | 3 | [10] | F Bergevi M Veldheer | 6 | 6 | |||||||||||||||||||||
P Matuszewski  Kai Wehnelt | 3 | 6 | [6] | F Bergevi M Veldheer | 6 | 6 | |||||||||||||||||||||
| 4 | RC Bollipalli A Kadhe | 4 | 63 |  T Matsui K Uesugi | 1 | 3 | |||||||||||||||||||||
| T Matsui K Uesugi | 6 | 77 | T Matsui K Uesugi | 6 | 5 | [10] | |||||||||||||||||||||
 I Sabanov M Sabanov | 4 | 2 | S-c Hong  F Sun | 3 | 7 | [3] | |||||||||||||||||||||
| S-c Hong F Sun | 6 | 6 | F Bergevi M Veldheer | ||||||||||||||||||||||||
| WC | Hibiki Arimoto Yusaku Sugaya | 5 | 3 |  R Ho C Puttergill | |||||||||||||||||||||||
| R Ho C Puttergill | 7 | 6 | R Ho C Puttergill | 7 | 6 | ||||||||||||||||||||||
| Y-h Hsu Y Shimizu | 6 | 67 | [5] | 3 | K Drzewiecki Z Kolář | 5 | 4 | ||||||||||||||||||||
| 3 | K Drzewiecki Z Kolář | 4 | 79 | [10] | R Ho C Puttergill | 6 | 77 | ||||||||||||||||||||
| Y-s Chung R Gonzales | 7 | 6 | Y-s Chung R Gonzales | 3 | 65 | ||||||||||||||||||||||
| WC | S Hazawa M Imamura | 5 | 2 | Y-s Chung R Gonzales | 79 | 6 | |||||||||||||||||||||
| N Kaliyanda Poonacha D Sharan | 65 | 6 | [9] | 2 | A Harris J-s Nam | 67 | 3 | ||||||||||||||||||||
| 2 | A Harris J-s Nam | 77 | 4 | [11] | |||||||||||||||||||||||
Defending champion Rod Laver successfully defended his title, defeating John Newcombe in the final, 6–4, 5–7, 6–4, 6–4 to win the gentlemen's singles tennis title at the 1969 Wimbledon Championships. It was the third leg of an eventual second Grand Slam for Laver, which remains the only Grand Slam achieved in men's singles tennis in the Open Era.
Ted Schroeder defeated Jaroslav Drobný in the final, 3–6, 6–0, 6–3, 4–6, 6–4 to win the gentlemen's singles tennis title at the 1949 Wimbledon Championships. Bob Falkenburg was the defending champion, but lost in the quarterfinals to John Bromwich.
Rod Laver and Roy Emerson defeated Ken Rosewall and Fred Stolle 6–4, 6–4 in the final to win the men's doubles title at the 1969 Australian Open. Dick Crealy and Allan Stone were the defending champions but lost in the Quarterfinals to Laver and Emerson.
Ken Rosewall and Fred Stolle defeated Roy Emerson and Rod Laver 6–3, 6–4, 6–3 in the final to win the men's doubles title at the 1968 French Open tennis tournament. John Newcombe and Tony Roche were the defending champions but chose not to defend their title.
Ariel Behar and Andrey Golubev were the defending champions but only Behar chose to defend his title, partnering Aliaksandr Bury. Behar lost in the quarterfinals to Victor Vlad Cornea and Zdeněk Kolář.
John Bromwich and Frank Sedgman were the defending champions, but lost in the quarterfinals to Budge Patty and Eric Sturgess.
Wu Di and Zhang Zhizhen were the defending champions but only Wu chose to defend his title, partnering Wu Yibing. Wu lost in the quarterfinals to Quentin Halys and Calvin Hemery.
Dino Marcan and Tristan-Samuel Weissborn were the defending champions but chose not to defend their title.
Sander Arends and David Pel were the defending champions but chose not to defend their title.
Hunter Reese and Jan Zieliński were the defending champions but chose not to defend their title.
Sadio Doumbia and Fabien Reboul were the defending champions but lost in the quarterfinals to Victor Vlad Cornea and Fabian Fallert.
Victor Vlad Cornea and Fabian Fallert were the defending champions and successfully defended their title, defeating Antonio Šančić and Igor Zelenay 6–4, 3–6, [10–2] in the final.
Gonçalo Oliveira and Andrei Vasilevski were the defending champions but chose not to defend their title.
Victor Vlad Cornea and Petros Tsitsipas were the defending champions. However, only Cornea chose to defend his title; he partnered with Andrew Paulson. They went on to win the title, defeating Adrian Andreev and Murkel Dellien 6–3, 6–1 in the final.
Hsieh Cheng-peng and Christopher Rungkat were the defending champions but only Rungkat chose to defend his title, partnering Ruben Gonzales. Rungkat lost in the quarterfinals to Marc Polmans and Max Purcell.
Moez Echargui and Skander Mansouri were the defending champions but chose not to defend their title.
This was the first edition of the tournament as an ATP Challenger Tour event.
Purav Raja and Ramkumar Ramanathan were the defending champions but only Ramanathan chose to defend his title, partnering Arjun Kadhe. Ramanathan lost in the quarterfinals to Marc Polmans and Jason Taylor.
Nam Ji-sung and Song Min-kyu were the defending champions but chose not to defend their title.
Victor Vlad Cornea and Petr Nouza were the defending champions but chose to defend their title with different partners. Cornea partnered Sergio Martos Gornés but lost in the semifinals to Sander Arends and David Pel. Nouza partnered Vitaliy Sachko but lost in the first round to Cornea and Martos Gornés.