John Isner defeated J J Wolf 3-6 7-5 7-6 in the Dallas semi-final on hard. The result followed the form book — John Isner came in leading the head-to-head 1–0, defending last year's semi-final. John Isner extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-07-26 | Atlanta | R32 | hard | John Isner | 6-4 6-7 6-4 |
Averages over each player's completed matches in the selected window (22 vs 103). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About