2019 Keio Challenger
The 2019 Keio Challenger was a professional tennis tournament played on hard courts. It was the fourteenth and third editions of the tournament and part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Yokohama, Japan between 25 February and 10 March 2019.Seeds
The following players received wildcards into the singles main draw:
- Shinji Hazawa
- Masamichi Imamura
- Naoto Kai
- Sung Yo-han
- Kaito Uesugi
The following player received entry into the singles main draw using a protected ranking:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
- Shintaro Imai
Women's singles main draw entrants
Seeds
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
The following players received entry from the qualifying draw:
Men's Singles
