Cagla Buyukakcay defeated Jelena Ostapenko 6-2 3-6 6-3 in the TUR vs LAT round robin on hard. The upset overturned the form book — Jelena Ostapenko came in ranked #32, leading the head-to-head 1–0, defending last year's round-robin. Cagla Buyukakcay claimed a first win over Jelena Ostapenko in two meetings, levelling the head-to-head at 1–1.
Buyukakcay C. came through in three sets.
Buyukakcay C. and Ostapenko J. faced 6 of the same opponents in the last 12 months. Buyukakcay C. went 1–5 (17%) against them, Ostapenko J. 5–5 (50%). Ostapenko J. came out clearly better against 4 of 6 comparable opponents, Buyukakcay C. against 0 — though 1 of those edges carries caveats (lower-tier event).
Cagla Buyukakcay beat Jelena Ostapenko 6-2 3-6 6-3. Umpiry, "Cagla Buyukakcay vs Jelena Ostapenko — TUR vs LAT Round Robin", https://umpiry.com/match/2018-02-07/buyukakcay-vs-ostapenko-tur-vs-lat-rr?utm_source=cite (as of 7 February 2018).