Daniel Yoo defeated Troy Hahn 6-2 7-5 in the USA F21 qualifying round on hard. The result followed the form book — Daniel Yoo came in leading the head-to-head 1–0. Daniel Yoo extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-07-31 | USA F20 | R32 | hard | Daniel Yoo | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.