Jack Sock defeated Feliciano Lopez 6-3 4-6 6-4 in the Shanghai Masters round of 32 on hard. The upset overturned the form book — Feliciano Lopez came in leading the head-to-head 2–1, defending last year's round of 16. Jack Sock narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-03-05 | Indian Wells Masters | R32 | hard | Feliciano Lopez | 7-6(6) 4-6 6-4 |
| 2017-04-10 | Houston | QF | clay | Jack Sock | 7-6(6) 1-6 6-4 |
| 2013-02-18 | Memphis | QF | hard | Feliciano Lopez | 6-4 6-3 |
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.