Nikolay Davydenko defeated Juan Martin del Potro 6-3 6-2 in the Masters Cup round robin on hard. The upset overturned the form book — Juan Martin del Potro came in leading the head-to-head 4–2. Nikolay Davydenko narrowed the head-to-head to 4–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-11 | Cincinnati Masters | R32 | hard | Juan Martin del Potro | 7-5 7-5 |
| 2013-03-07 | Indian Wells Masters | R64 | hard | Juan Martin del Potro | 6-3 6-4 |
| 2012-02-20 | Marseille | R16 | hard | Juan Martin del Potro | 6-7(6) 6-4 RET |
| 2009-11-22 | Tour Finals | F | hard | Nikolay Davydenko | 6-3 6-4 |
| 2008-09-19 | Davis Cup WG SF: ARG vs RUS | RR | clay | Juan Martin del Potro | 6-1 6-4 6-2 |
| 2007-10-28 | Paris Masters | R32 | hard | Nikolay Davydenko | 7-6(3) 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