Sam Querrey defeated Juan Martin del Potro 7-5 7-5 in the Delray Beach semi-final on hard. The upset overturned the form book — Juan Martin del Potro came in leading the head-to-head 3–0. Sam Querrey claimed a first win over Juan Martin del Potro in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-02-20 | Delray Beach | QF | hard | Juan Martin del Potro | 7-5 7-5 |
| 2011-10-31 | Valencia | QF | hard | Juan Martin del Potro | 6-2 7-5 |
| 2009-01-12 | Auckland | F | hard | Juan Martin del Potro | 6-4 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 170). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About