Nikolay Davydenko defeated Karol Beck 7-6 6-2 in the Doha round of 16 on hard. The upset overturned the form book — Karol Beck came in leading the head-to-head 3–2, but Nikolay Davydenko had been the form player, winning 2 of their last 5 on hard. Nikolay Davydenko narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-10-17 | Madrid Masters | R32 | clay | Nikolay Davydenko | 6-4 6-1 |
| 2005-08-08 | Canada Masters | R16 | hard | Karol Beck | 6-4 3-6 7-6(4) |
| 2004-10-25 | St. Petersburg | R16 | carpet | Karol Beck | 6-1 6-7(4) 6-4 |
| 2004-08-30 | US Open | R32 | hard | Karol Beck | 6-3 4-6 3-6 6-1 6-4 |
| 2003-05-19 | St. Poelten | R32 | clay | Nikolay Davydenko | 6-4 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 99). ATP, WTA & Challenger.