Jack Sock defeated Santiago Giraldo 6-4 6-4 in the Houston quarter-final on clay. The upset overturned the form book — Santiago Giraldo came in leading the head-to-head 2–0, defending last year's semi-final. Jack Sock claimed a first win over Santiago Giraldo in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-07-22 | Atlanta | R32 | hard | Santiago Giraldo | 7-5 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 (199 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About