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Tamara Zidansek defeated Petra Marcinko 6-3, 7-5 — Iași Open 2026 Quarterfinal.
Tamara Zidansek and Petra Marcinko: Tamara Zidansek leads 1–0 across 1 recorded meeting.
Second-serve points built this upset. The market gave Petra Marcinko a 64 percent chance, and the No. 2 seed even edged the first-serve exchanges 59 percent to 57 — but she won just 6 of 25 points behind her second delivery while Tamara Zidansek took 19 of 34, feeding six breaks from ten chances. The WTA No. 131 had needed deciding sets to get past Emiliana Arango and Anna Bondar; this time her sixth break of the match, in game 12 for 7-5, closed it after 1 hour, 46 minutes. Zidansek moves into the Iași Open semifinals.