Alison Riske defeated Garbine Muguruza 2-6 6-1 6-3 in the US Open round of 128 on hard.
Riske A. came through in three sets.
Riske A. and Muguruza G. faced 6 of the same opponents in the last 12 months. Riske A. went 1–5 (17%) against them, Muguruza G. 5–1 (83%). Muguruza G. came out clearly better against 4 of 5 comparable opponents, Riske A. against 0 — though 1 of those edges carries caveats (retirement).
Alison Riske beat Garbine Muguruza 2-6 6-1 6-3. Umpiry, "Alison Riske vs Garbine Muguruza — US Open Round of 128", https://umpiry.com/match/2019-08-27/muguruza-vs-riske-us-open-r128?utm_source=cite (as of 27 August 2019).