2018 İstanbul Cup
The 2018 İstanbul Cup was a women's 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. Unseeded Pauline Parmentier won the singles title.
Finals
Singles
Pauline Parmentier defeated Polona Hercog, 6–4, 3–6, 6–3- It was Parmentier's 1s singles title of the year and the 3rd of her career.
Doubles
Liang Chen / Zhang Shuai defeated Xenia Knoll / Anna Smith, 6–4, 6–4Singles main-draw entrants
Seeds
- Rankings are as of April 16, 2018.
Other entrants
The following players received wildcardThe following players received entry from the qualifying draw:
Withdrawals
- Beatriz Haddad Maia → replaced by Christina McHale
- Kateryna Kozlova → replaced by Ajla Tomljanović
- Tatjana Maria → replaced by Sara Errani
- Naomi Osaka → replaced by Polona Hercog