Greg Ouellette defeated Daniel Yoo 7-5 6-4 in the USA F1 round of 32 on clay. The upset overturned the form book — Daniel Yoo came in leading the head-to-head 4–1. Greg Ouellette narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-08-20 | Winston-Salem | Q32 | hard | Daniel Yoo | 6-1 1-0 |
| 2010-07-12 | USA F18 | F | clay | Greg Ouellette | 7-5 1-6 6-3 |
| 2010-07-05 | USA F17 | QF | clay | Daniel Yoo | 6-2 6-4 |
| 2010-06-21 | USA F15 | F | hard | Daniel Yoo | 2-6 6-4 7-6(3) |
| 2010-02-01 | USA F4 | R32 | clay | Daniel Yoo | 6-3 3-0 |
Averages over each player's completed matches in the selected window (1 vs 22). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About