David Ferrer defeated Jack Sock 4-6 6-3 6-1 in the Stockholm round of 16 on hard. The upset overturned the form book — Jack Sock came in leading the head-to-head 2–1, but David Ferrer had been the form player, winning 3 of their last 5 on hard. David Ferrer narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-05-14 | Rome Masters | R64 | clay | Jack Sock | 6-3 6-4 |
| 2017-08-07 | Canada Masters | R32 | hard | David Ferrer | 7-6(7) 3-6 6-1 |
| 2016-01-11 | Auckland | SF | hard | Jack Sock | 3-6 6-1 6-2 |
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.