Jack Sock defeated Donald Young 6-4 6-3 in the Canada Masters round of 32 on hard. The result followed the form book — Jack Sock came in leading the head-to-head 2–0, defending last year's round of 16. Jack Sock extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-02-20 | Delray Beach | SF | hard | Jack Sock | 6-4 7-6(2) |
| 2015-10-26 | Basel | QF | hard | Jack Sock | 5-7 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
Averages over each player's completed matches in the selected window (199 vs 200). ATP, WTA & Challenger.