Nikolay Davydenko defeated Juan Ignacio Chela 7-6 6-2 in the Valencia round of 16 on hard. The upset overturned the form book — Juan Ignacio Chela came in leading the head-to-head 6–1. Nikolay Davydenko narrowed the head-to-head to 6–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-07-26 | Umag | QF | clay | Juan Ignacio Chela | 6-2 6-1 |
| 2006-12-01 | Davis Cup WG F: RUS vs ARG | RR | carpet | Nikolay Davydenko | 6-1 6-2 5-7 6-4 |
| 2006-08-14 | Cincinnati Masters | R64 | hard | Juan Ignacio Chela | 6-4 2-6 6-2 |
| 2005-08-22 | New Haven | R32 | hard | Juan Ignacio Chela | 6-1 7-6(5) |
| 2002-07-22 | Kitzbuhel | R16 | clay | Juan Ignacio Chela | 6-0 6-1 |
| 2002-05-06 | Rome Masters | R64 | clay | Juan Ignacio Chela | 6-1 2-6 6-1 |
| 2001-07-16 | Amsterdam | R16 | clay | Juan Ignacio Chela | 6-2 6-4 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.