Donald Young defeated Stefan Kozlov 4-6 6-4 6-4 in the Delray Beach qualifying round on hard. The result followed the form book — Donald Young came in leading the head-to-head 1–0. Donald Young extended the head-to-head to 2–0.
Young D. came through in three sets.
Hard: Young D. leads 1–0 · Grass: Young D. leads 1–0
Donald Young beat Stefan Kozlov 4-6 6-4 6-4. Umpiry, "Donald Young vs Stefan Kozlov — Delray Beach Qualifying Round", https://umpiry.com/match/2021-01-06/kozlov-vs-young-delray-beach-qf?utm_source=cite (as of 6 January 2021).