2018 İstanbul Cup
The 2018 İstanbul Cup was a tennis tournament played on outdoor clay courts. It was the 11th edition of the İstanbul Cup, and part of the WTA International tournaments of the 2018 WTA Tour. It took place in Istanbul, Turkey, from 23 through 29 April 2018.Prize money
Seeds
- Rankings are as of April 16, 2018.
Other entrants
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Seeds
- 1 Rankings as of April 16, 2018.
Other entrants
The following pairs received wildcards into the doubles main draw:
;During the tournament
- Kateryna Bondarenko
Champions
Singles