Jan Hernych defeated Nikolay Davydenko 7-5 7-5 in the Valencia round of 32 on hard. The upset overturned the form book — Nikolay Davydenko came in leading the head-to-head 5–1, defending last year's round of 32. Jan Hernych narrowed the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-31 | US Open | R64 | hard | Nikolay Davydenko | 6-4 6-1 6-2 |
| 2008-03-03 | Dubai | R16 | hard | Nikolay Davydenko | 6-1 6-4 |
| 2008-02-18 | Rotterdam | R32 | hard | Nikolay Davydenko | 6-3 6-3 |
| 2007-03-05 | Indian Wells Masters | R32 | hard | Nikolay Davydenko | 6-3 6-1 |
| 2006-02-20 | Rotterdam | R32 | hard | Nikolay Davydenko | 6-3 6-3 |
| 2004-03-08 | Indian Wells Masters | R128 | hard | Jan Hernych | 2-6 6-4 6-1 |
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