Joao Sousa defeated Jack Sock 6-1 6-7 6-2 in the Madrid Masters round of 16 on clay. The upset overturned the form book — Jack Sock came in leading the head-to-head 1–0, defending last year's round of 32. Joao Sousa claimed a first win over Jack Sock in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-01-09 | Auckland | F | hard | Jack Sock | 6-3 5-7 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 (200 vs 199). ATP, WTA & Challenger.