2018 Keio Challenger
Date	26 February – 4 March (ATP) 5 – 11 March (ITF)
Edition	13th (ATP) 2nd (ITF)
Category	ATP Challenger Tour ITF Women's Circuit
Surface	Hard
Location	Yokohama, Japan
Champions
Men's singles
Yasutaka Uchiyama
Women's singles
Veronika Kudermetova
Men's doubles
Tobias Kamke / Tim Pütz
Women's doubles
Laura Robson / Fanny Stollár
← 2017 · Keio Challenger · 2019 →

The 2018 Keio Challenger was a professional tennis tournament played on hard courts. It was the thirteenth (ATP) and second (ITF) editions of the tournament and part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Yokohama, Japan between 26 February and 4 March 2018 for the men's edition and between 5 and 11 March 2018 for the women's.

Country	Player	Rank1	Seed
AUS	Jordan Thompson	95	1
AUS	John Millman	103	2
TPE	Jason Jung	153	3
JPN	Go Soeda	156	4
FRA	Stéphane Robert	158	5
KOR	Kwon Soon-woo	180	6
JPN	Tatsuma Ito	181	7
KOR	Lee Duck-hee	190	8

• ¹ Rankings are as of 19 February 2018.

The following players received wildcards into the singles main draw:

• Shinji Hazawa
• Kaito Itsusaki
• Kaito Uesugi
• Yosuke Watanuki

The following player received entry into the singles main draw as a special exempt:

• Blake Ellis

The following players received entry from the qualifying draw:

• Chung Yun-seong
• Hiroyasu Ehara
• Hiroki Moriya
• Jumpei Yamasaki

The following player received entry as a lucky loser:

• Daniel Nguyen

Country	Player	Rank1	Seed
JPN	Eri Hozumi	180	1
JPN	Junri Namigata	196	2
JPN	Miharu Imanishi	197	3
ITA	Georgia Brescia	202	4
GBR	Laura Robson	218	5
TUR	Ayla Aksu	226	6
RUS	Veronika Kudermetova	227	7
CHN	Lu Jiajing	232	8

• ¹ Rankings are as of 26 February 2018.

The following players received wildcards into the singles main draw:

• Ayumi Hirata
• Marina Kurosu
• Megumi Nishimoto
• Satoko Sueno

The following players received entry from the qualifying draw:

• Harriet Dart
• Misa Eguchi
• Mai Hontama
• Momoko Kobori
• Lee Ya-hsuan
• Ma Yexin
• Katherine Sebov
• Moyuka Uchijima

• Yasutaka Uchiyama def. Tatsuma Ito 2–6, 6–3, 6–4.

• Veronika Kudermetova def. Harriet Dart, 6–2, 6–4

• Tobias Kamke / Tim Pütz def. Sanchai Ratiwatana / Sonchat Ratiwatana 3–6, 7–5, [12–10].

• Laura Robson / Fanny Stollár def. Momoko Kobori / Chihiro Muramatsu, 5–7, 6–2, [10–4]

• Official Website