Vitaliy Sachko defeated Jan Kumstat 5-7 6-0 6-3 in the Prostejov round of 32 on clay.
Sachko V. came through in three sets.
Vitaliy Sachko beat Jan Kumstat 5-7 6-0 6-3. Umpiry, "Vitaliy Sachko vs Jan Kumstat — Prostejov Round of 32", https://umpiry.com/match/2026-06-02/kumstat-vs-sachko-prostejov-r32?utm_source=cite (as of 2 June 2026).