2018 Koser Jewelers Tennis Challenge – Singles

Vera Lapko was the defending champion, but chose to participate in Montreal.

Madison Brengle won the title after Kristie Ahn retired in the final at 6–4, 1–0.

Seeds
• # 🇺🇸 Nicole Gibbs (first round)

• # Arantxa Rus (first round)

• # 🇺🇸 Madison Brengle (champion)

• # 🇷🇺 Vera Zvonareva (first round)

• # 🇬🇧 Heather Watson (first round)

• # 🇷🇺 Anastasia Potapova (second round)

• # 🇺🇦 Anhelina Kalinina (quarterfinals)

• # 🇬🇧 Naomi Broady (first round)