Vladimir Ivanov defeated Otto Virtanen 2-6 6-4 7-6 in the M15 Parnu 1 quarter-final on clay. The upset overturned the form book — Otto Virtanen came in leading the head-to-head 1–0. Vladimir Ivanov claimed a first win over Otto Virtanen in two meetings, levelling the head-to-head at 1–1.
Ivanov V. came through in three sets.
Clay: Ivanov V. leads 1–0 · Hard: Virtanen O. leads 1–0
Vladimir Ivanov beat Otto Virtanen 2-6 6-4 7-6(5). Umpiry, "Vladimir Ivanov vs Otto Virtanen — M15 Parnu 1 Quarter-final", https://umpiry.com/match/2021-08-06/ivanov-vs-virtanen-m15-parnu-1-qf?utm_source=cite (as of 6 August 2021).