Feliciano Lopez defeated Jack Sock 6-4 6-3 in the Memphis quarter-final on hard. The upset overturned the form book — Jack Sock came in leading the head-to-head 2–1, defending last year's round of 32. Feliciano Lopez 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 |
| 2016-10-10 | Shanghai Masters | R32 | hard | Jack Sock | 6-3 4-6 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 199). ATP, WTA & Challenger.