Olga Ianchuk defeated Julia Stamatova 2-6 6-2 6-3 in the Warsaw quarter-final on clay. The result followed the form book — Olga Ianchuk came in leading the head-to-head 2–0, defending last year's final. Olga Ianchuk extended the head-to-head to 3–0.
Ianchuk O. came through in three sets.
Clay: Ianchuk O. leads 2–0 · Hard: Ianchuk O. leads 1–0
Olga Ianchuk beat Julia Stamatova 2-6 6-2 6-3. Umpiry, "Olga Ianchuk vs Julia Stamatova — Warsaw Quarter-final", https://umpiry.com/match/2018-08-10/ianchuk-vs-stamatova-warsaw-qf?utm_source=cite (as of 10 August 2018).