2018 Keio Challenger
The 2018 Keio Challenger was a professional tennis tournament played on hard courts. It was the thirteenth and second 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.Seeds
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as a special exempt:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Seeds
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Men's Singles
