Juan Martin del Potro defeated Jurgen Melzer 6-3 6-1 6-4 in the US Open round of 64 on hard. The result followed the form book — Juan Martin del Potro came in leading the head-to-head 4–1, defending last year's round of 128. Juan Martin del Potro extended the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-10-11 | Shanghai Masters | R32 | hard | Jurgen Melzer | 7-5 2-1 RET |
| 2009-08-31 | US Open | R64 | hard | Juan Martin del Potro | 7-6(6) 6-3 6-3 |
| 2009-03-12 | Indian Wells Masters | R32 | hard | Juan Martin del Potro | 6-2 2-6 7-6(2) |
| 2008-07-14 | Kitzbuhel | F | clay | Juan Martin del Potro | 6-2 6-1 |
| 2007-02-09 | Davis Cup WG R1: AUT vs ARG | RR | carpet | Juan Martin del Potro | 7-6(4) 3-6 6-4 4-6 6-2 |
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 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About