Juan Martin del Potro defeated Daniel Koellerer 6-3 6-2 in the US Open q32 on hard. The result followed the form book — Juan Martin del Potro came in leading the head-to-head 1–0. Juan Martin del Potro extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-31 | US Open | R32 | hard | Juan Martin del Potro | 6-1 3-6 6-3 6-3 |
Averages over each player's completed matches in the selected window (200 vs 45). 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. About