2018 Keio Challenger – Men's doubles

Men's doubles
Men's doubles
2018 Keio Challenger
Champions	Tobias Kamke; Tim Pütz
Runners-up	Sanchai Ratiwatana; Sonchat Ratiwatana
Score	3–6, 7–5, [12–10]

Marin and Tomislav Draganja were the defending champions but chose not to defend their title.

Tobias Kamke and Tim Pütz won the title after defeating Sanchai and Sonchat Ratiwatana 3–6, 7–5, [12–10] in the final.

Seeds

First round					Quarterfinals					Semifinals					Final

1	Sa Ratiwatana So Ratiwatana	6	6
WC	S Hazawa M Imamura	3	4		1	Sa Ratiwatana So Ratiwatana	6	7
	Z Li S Robert	6	4	[0]		M Purcell A Whittington	3	5
	M Purcell A Whittington	3	6	[10]						1	Sa Ratiwatana So Ratiwatana	5	6	[10]
4	T Matsui C-h Yi	6	2							WC	T Ito K Uesugi	7	2	[6]
Q	M Donati E Leshem	1	1^r		4	T Matsui C-h Yi	7⁹	5	[8]
WC	T Ito K Uesugi	6	6		WC	T Ito K Uesugi	6⁷	7	[10]
WC	Masahiro Fukuda Eiji Yamasaki	2	3												1	Sa Ratiwatana So Ratiwatana	6	5	[10]
	T Altuna H Hurkacz	4	2													T Kamke T Pütz	3	7	[12]
	C Rungkat Ze Zhang	6	6			C Rungkat Ze Zhang	6	6
	B Klein L Margaroli	7⁷	6⁵	[6]	3	H-y Peng A Siljeström	2	2
3	H-y Peng A Siljeström	6²	7⁷	[10]							C Rungkat Ze Zhang	3	3
	M Gong C-p Hsieh	6	7⁷								T Kamke T Pütz	6	6
	T Chen J Jung	3	6⁵			M Gong C-p Hsieh	6¹	6³
	T Kamke T Pütz	6	6			T Kamke T Pütz	7⁷	7⁷
2	S Balaji Y Uchiyama	4	3