Tanja Ostertag defeated Ksenia Kirillova 6-4 7-6 in the Lenzerheide 10K round of 16 on clay. The upset overturned the form book — Ksenia Kirillova came in leading the head-to-head 1–0. Tanja Ostertag claimed a first win over Ksenia Kirillova in two meetings, levelling the head-to-head at 1–1.
Ostertag T. took it in straight sets.
Clay: Ostertag T. leads 1–0 · Hard: Kirillova K. leads 1–0
Tanja Ostertag beat Ksenia Kirillova 6-4 7-6(5). Umpiry, "Tanja Ostertag vs Ksenia Kirillova — Lenzerheide 10K Round of 16", https://umpiry.com/match/2010-06-14/kirillova-vs-ostertag-lenzerheide-10k-r16?utm_source=cite (as of 14 June 2010).