2018 Citi Open – Women's singles
| Women's singles | |
|---|---|
| 2018 Citi Open | |
| Champion | Svetlana Kuznetsova |
| Runner-up | Donna Vekić |
| Score | 4–6, 7–6(9–7), 6–2 |
Ekaterina Makarova was the defending champion, but lost in the first round to Ana Bogdan.
Svetlana Kuznetsova won the title, beating Donna Vekić in the final, 4–6, 7–6(9–7), 6–2, despite being four match points down in the second set.