
Jack Sock defeated Alexander Zverev 6-4 1-6 6-4 in the Tour Finals round robin on hard. The upset overturned the form book — Alexander Zverev came in leading the head-to-head 2–1. Jack Sock narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-08-30 | US Open | R32 | hard | Alexander Zverev | 3-6 6-2 6-3 2-1 RET |
| 2016-10-17 | Stockholm | SF | hard | Jack Sock | 6-7(4) 7-6(4) 6-4 |
| 2016-10-03 | Beijing | R16 | hard | Alexander Zverev | 6-4 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
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (199 vs 199). ATP, WTA & Challenger.