Jelena Ostapenko defeated Alison Riske 6-4 6-3 in the US Open round of 64 on hard.
Ostapenko J. took it in straight sets.
Ostapenko J. and Riske A. faced 5 of the same opponents in the last 12 months. Ostapenko J. went 1–4 (20%) against them, Riske A. 1–4 (20%). Results against comparable opponents are close (1 : 0 better-results split).
Jelena Ostapenko beat Alison Riske 6-4 6-3. Umpiry, "Jelena Ostapenko vs Alison Riske — US Open Round of 64", https://umpiry.com/match/2019-08-29/ostapenko-vs-riske-us-open-r64?utm_source=cite (as of 29 August 2019).