Donald Young defeated Stefan Kozlov 6-0 6-4 in the Newport round of 16 on grass. The result followed the form book — Donald Young came in leading the head-to-head 2–0. Donald Young extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-01-04 | Delray Beach | Q2 | hard | Donald Young | 4-6 6-4 6-4 |
| 2017-03-06 | Indian Wells Masters | R128 | hard | Donald Young | 7-5 7-6(5) |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 199). ATP, WTA & Challenger.