
John Isner defeated Frances Tiafoe 6-4 2-6 6-3 in the Houston quarter-final on clay. The result followed the form book — John Isner came in leading the head-to-head 2–0. John Isner extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-08-14 | Cincinnati Masters | R16 | hard | John Isner | 7-6 7-5 |
| 2016-08-29 | US Open | R128 | hard | John Isner | 3-6 4-6 7-6 6-2 7-6 |
Averages over each player's completed matches in the selected window (63 vs 200). 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
Per-surface Serve / Return Rating (0–100, percentile within the clay field, opponent-adjusted over 52 weeks). About