Dalibor Svrcina defeated Patrik Rikl 7-6 6-4 in the M25 Most 1 quarter-final on clay. The upset overturned the form book — Patrik Rikl came in leading the head-to-head 1–0. Dalibor Svrcina claimed a first win over Patrik Rikl in two meetings, levelling the head-to-head at 1–1.
Svrcina D. took it in straight sets.
Dalibor Svrcina beat Patrik Rikl 7-6(1) 6-4. Umpiry, "Dalibor Svrcina vs Patrik Rikl — M25 Most 1 Quarter-final", https://umpiry.com/match/2021-05-28/rikl-vs-svrcina-m25-most-1-qf?utm_source=cite (as of 28 May 2021).