Santiago Giraldo defeated Jack Sock 7-5 6-4 in the Atlanta round of 32 on hard. The upset overturned the form book — Jack Sock came in defending last year's quarter-final, but Santiago Giraldo had been the form player, winning 3 of their last 8 on hard. Santiago Giraldo extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-04-06 | Houston | QF | clay | Jack Sock | 6-4 6-4 |
| 2012-03-08 | Indian Wells Masters | R128 | hard | Santiago Giraldo | 5-7 6-0 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 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About