Sorana Cirstea defeated Andrea Petkovic 2-6 7-6 7-6 in the Nurnberg round of 32 on clay. The result followed the form book — Sorana Cirstea came in defending last year's semi-final.
Cirstea S. came through in three sets.
Cirstea S. and Petkovic A. faced 6 of the same opponents in the last 12 months. Cirstea S. went 5–1 (83%) against them, Petkovic A. 1–7 (13%). Cirstea S. came out clearly better against 5 of 6 comparable opponents, Petkovic A. against 0 — though 1 of those edges carries caveats (retirement).
Sorana Cirstea beat Andrea Petkovic 2-6 7-6 7-6. Umpiry, "Sorana Cirstea vs Andrea Petkovic — Nurnberg Round of 32", https://umpiry.com/match/2018-05-21/cirstea-vs-petkovic-nurnberg-r32?utm_source=cite (as of 21 May 2018).