Nicolas Kiefer defeated Paul Henri Mathieu 6-4 6-4 in the Hamburg Masters round of 64 on clay. The upset overturned the form book — Paul Henri Mathieu came in defending last year's round of 32. Nicolas Kiefer extended the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-08-11 | Beijing Olympics | R16 | hard | Paul Henri Mathieu | 6-3 7-5 |
| 2007-09-24 | Mumbai | R32 | hard | Nicolas Kiefer | 6-4 6-3 |
| 2006-03-06 | Indian Wells Masters | R64 | hard | Paul Henri Mathieu | 7-6(5) 4-6 6-2 |
| 2003-08-18 | Long Island | R32 | hard | Nicolas Kiefer | 4-6 7-6(4) 6-3 |
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 (69 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About