Aryna Sabalenka defeated Bernarda Pera 7-6 6-2 in the Adelaide round of 16 on hard. The upset overturned the form book — Bernarda Pera came in leading the head-to-head 1–0, but Aryna Sabalenka had been the form player, winning 4 of their last 6 on hard. Aryna Sabalenka claimed a first win over Bernarda Pera in two meetings, levelling the head-to-head at 1–1.
Sabalenka A. took it in straight sets.
Sabalenka A. and Pera B. faced 7 of the same opponents in the last 12 months. Sabalenka A. went 6–2 (75%) against them, Pera B. 3–4 (43%). Sabalenka A. came out better against 3 of 7 comparable opponents, Pera B. against 0 — though 1 of those edges carries caveats (lower-tier event).
Hard: Sabalenka A. leads 1–0 · Clay: Pera B. leads 1–0
Aryna Sabalenka beat Bernarda Pera 7-6 6-2. Umpiry, "Aryna Sabalenka vs Bernarda Pera — Adelaide Round of 16", https://umpiry.com/match/2020-01-13/pera-vs-sabalenka-adelaide-r16?utm_source=cite (as of 13 January 2020).