H2H data updated: 2026-07-18 07:16 UTC
Stefan Kozlov vs Donald Young H2H: 0-2
Donald Young holds a 2–0 lead over Stefan Kozlov in their ATP head-to-head. Across 2 main-draw meetings, Donald Young leads 1–0 on grass and 1–0 on hard courts. Most recently, Donald Young won the 2017 Indian Wells Masters first round 7-5 7-6(5).
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
United States
Age 28
Right-Handed
183 cm / 6'0"
H2H
0
–
2
2 main draw meetings
USA
Age 36
Left-Handed
183 cm / 6'0"
H2H Match Log
| Date | Tournament | Category | Round | Surface | Winner | Score | Loser | Match |
|---|---|---|---|---|---|---|---|---|
| Jan 7, 2021* | Delray Beach | ATP 250 | Q2 | Hard | Donald Young | 4-6 6-4 6-4 | Stefan Kozlov | Match data |
| Mar 11, 2017* | Indian Wells Masters | Masters 1000 | R128 | Hard | Donald Young | 7-5 7-6(5) | Stefan Kozlov | Match data |
| Jul 15, 2016* | Newport | ATP 250 | R16 | Grass | Donald Young | 6-0 6-4 | Stefan Kozlov | Match data |
* Estimated match date where the exact historical date is unavailable.
Career Comparison
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 | Finals | 500 | 250 | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stefan Kozlov | #296 | #103 | 558 | 1,673 | 9 | 26 | 25.7% | 0 | 0 | 0 | 0 | 0 | 0 |
| Donald Young | #1,350 | #38 | 1,039 | 1,942 | 125 | 187 | 40.1% | 0 | 0 | 0 | 0 | 0 | 0 |
Career Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Age | Stefan Kozlov | Donald Young | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 15 | 2013 | 0–1 | 0.0% | #1083 | 1,489 | 0 | 0 | 2005 | 0–7 | 0.0% | #553 | 1,402 | 0 | 0 |
| 16 | 2014 | 0–1 | 0.0% | #467 | 1,453 | 0 | 0 | 2006 | 0–3 | 0.0% | #494 | 1,380 | 0 | 0 |
| 17 | 2015 | 0–2 | 0.0% | #351 | 1,420 | 0 | 0 | 2007 | 3–3 | 50.0% | #100 | 1,467 | 0 | 0 |
| 18 | 2016 | 3–2 | 60.0% | #116 | 1,481 | 0 | 0 | 2008 | 8–20 | 28.6% | #138 | 1,497 | 0 | 0 |
| 19 | 2017 | 2–9 | 18.2% | #167 | 1,549 | 0 | 0 | 2009 | 0–4 | 0.0% | #194 | 1,526 | 0 | 0 |
| 20 | 2018 | 0–1 | 0.0% | #316 | 1,528 | 0 | 0 | 2010 | 3–6 | 33.3% | #127 | 1,557 | 0 | 0 |
| 21 | — | — | — | — | — | — | — | 2011 | 19–17 | 52.8% | #39 | 1,800 | 0 | 0 |
| 22 | 2020 | 0–1 | 0.0% | #371 | 1,514 | 0 | 0 | 2012 | 5–23 | 17.9% | #190 | 1,590 | 0 | 0 |
| 23 | 2021 | 0–1 | 0.0% | #159 | 1,550 | 0 | 0 | 2013 | 2–3 | 40.0% | #96 | 1,695 | 0 | 0 |
| 24 | 2022 | 4–8 | 33.3% | #198 | 1,529 | 0 | 0 | 2014 | 18–21 | 46.2% | #57 | 1,759 | 0 | 0 |
| 25 | — | — | — | — | — | — | — | 2015 | 21–22 | 48.8% | #48 | 1,828 | 0 | 0 |
| 26 | — | — | — | — | — | — | — | 2016 | 18–21 | 46.2% | #88 | 1,801 | 0 | 0 |
| 27 | — | — | — | — | — | — | — | 2017 | 25–22 | 53.2% | #61 | 1,790 | 0 | 0 |
| 28 | — | — | — | — | — | — | — | 2018 | 3–12 | 20.0% | #248 | 1,728 | 0 | 0 |
| 29 | — | — | — | — | — | — | — | 2019 | 0–2 | 0.0% | #230 | 1,649 | 0 | 0 |
| 31 | — | — | — | — | — | — | — | 2021 | 0–1 | 0.0% | #411 | 1,604 | 0 | 0 |