Petra Kvitova defeated Maria Sakkari 6-3 3-6 6-3 in the Stuttgart round of 16 on clay. The upset overturned the form book — Maria Sakkari came in ranked #33. Petra Kvitova extended the head-to-head to 3–2.
Kvitova P. came through in three sets.
Kvitova P. and Sakkari M. faced 4 of the same opponents in the last 12 months. Kvitova P. went 4–1 (80%) against them, Sakkari M. 3–2 (60%). Results against comparable opponents are close (2 : 1 better-results split).
Only 4 common opponents — small sample, treat as indicative.
Clay: level 1–1 · Hard: Kvitova P. leads 2–1