Santiago Giraldo defeated Denis Istomin 7-6 6-4 in the Barcelona round of 64 on clay. The upset overturned the form book — Denis Istomin came in leading the head-to-head 2–0, defending last year's round of 64. Santiago Giraldo claimed a first win over Denis Istomin in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-07-29 | Washington | R64 | hard | Denis Istomin | 6-3 6-4 |
| 2009-05-25 | Roland Garros | R128 | clay | Denis Istomin | 6-3 6-7(2) 6-3 7-6(4) |
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