Jack Sock defeated Alexandr Dolgopolov 6-4 6-1 in the Tokyo round of 32 on hard. The upset overturned the form book — Alexandr Dolgopolov came in leading the head-to-head 1–0, defending last year's quarter-final. Jack Sock claimed a first win over Alexandr Dolgopolov in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-10-09 | Shanghai Masters | R64 | hard | Alexandr Dolgopolov | 4-6 6-1 2-1 RET |
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 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About