The 2017 Keio Challenger was a professional tennis tournament played on hard courts. It was the twelfth (ATP) and first (ITF) editions of the tournament and part of the 2017 ATP Challenger Tour and the 2017 ITF Women's Circuit. The tournament offered $50,000+H in prize money for the men and $25,000 prize money for the women. It took place in Yokohama, Japan between 27 February and 5 March 2017 for the men's edition and between 6 and 12 March 2017 for the women's.

2017 Keio Challenger
Date27 February – 5 March (ATP)
6 – 12 March (ITF)
Edition12th (ATP)
1st (ITF)
CategoryATP Challenger Tour
ITF Women's Circuit
Prize money$50,000+H (ATP)
$25,000 (ITF)
SurfaceHard
LocationYokohama, Japan
Champions
Men's singles
Japan Yūichi Sugita
Women's singles
Japan Akiko Omae
Men's doubles
Croatia Marin Draganja / Croatia Tomislav Draganja
Women's doubles
Japan Ayaka Okuno / Japan Erika Sema
← 2015 · Keio Challenger · 2018 →

Men's singles main-draw entrants

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Seeds

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Country Player Rank1 Seed
  JPN Yūichi Sugita 114 1
   SUI Henri Laaksonen 122 2
  KOR Lee Duck-hee 135 3
  JPN Go Soeda 136 4
  SLO Grega Žemlja 150 5
  BEL Ruben Bemelmans 152 6
  CHN Zhang Ze 157 7
  AUS Andrew Whittington 164 8
  • 1 Rankings are as of February 20, 2017.

Other entrants

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The following players received wildcards into the singles main draw:

The following player received entry into the singles main using a protected ranking:

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

The following players received entry from the qualifying draw:

Women's singles main-draw entrants

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Seeds

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Country Player Rank1 Seed
  JPN Miyu Kato 201 1
  GBR Laura Robson 207 2
  JPN Akiko Omae 229 3
  JPN Mayo Hibi 230 4
  JPN Shiho Akita 246 5
  JPN Junri Namigata 256 6
  KAZ Galina Voskoboeva 257 7
  JPN Kyōka Okamura 259 8
  • 1 Rankings are as of February 27, 2017.

Other entrants

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The following players received wildcards into the singles main draw:

The following players received entry from the qualifying draw:

Champions

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Men's singles

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Women's singles

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Men's doubles

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Women's doubles

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