Flavia Pennetta defeated Agnieszka Radwanska 7-6 6-4 in the Singapore round robin on hard. The upset overturned the form book — Agnieszka Radwanska came in leading the head-to-head 5–3, defending last year's semi-final. Flavia Pennetta narrowed the head-to-head to 5–4.
Pennetta F. took it in straight sets.
Pennetta F. and Radwanska A. faced 16 of the same opponents in the last 12 months. Pennetta F. went 13–7 (65%) against them, Radwanska A. 10–13 (43%). Pennetta F. came out better against 6 of 15 comparable opponents, Radwanska A. against 3.
Hard: level 4–4 · Clay: Radwanska A. leads 1–0
Flavia Pennetta beat Agnieszka Radwanska 7-6(5) 6-4. Umpiry, "Flavia Pennetta vs Agnieszka Radwanska — Singapore Round Robin", https://umpiry.com/match/2015-10-27/pennetta-vs-radwanska-singapore-rr?utm_source=cite (as of 27 October 2015).