Nikolay Davydenko defeated Marco Chiudinelli 6-3 6-4 in the Doha round of 16 on hard. The upset overturned the form book — Marco Chiudinelli came in defending last year's round of 32, but Nikolay Davydenko had been the form player, winning 2 of their last 5 on hard. Nikolay Davydenko extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-02-27 | Dubai | R32 | hard | Marco Chiudinelli | 6-4 5-7 6-4 |
| 2009-08-31 | US Open | R32 | hard | Nikolay Davydenko | 6-4 7-5 7-5 |
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