John Isner defeated Jack Sock 7-6 6-4 in the Atlanta round of 16 on hard. The result followed the form book — John Isner came in leading the head-to-head 5–3. John Isner extended the head-to-head to 6–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-10-31 | Paris Masters | QF | hard | John Isner | 7-6 4-6 6-4 |
| 2016-04-04 | Houston | SF | clay | Jack Sock | 7-6 6-3 |
| 2015-10-26 | Basel | R16 | hard | Jack Sock | 7-6 6-3 |
| 2014-07-21 | Atlanta | SF | hard | John Isner | 7-5 6-4 |
| 2014-07-07 | Newport | QF | grass | Jack Sock | 6-4 7-6 |
| 2014-05-18 | Nice | R16 | clay | John Isner | 6-4 6-3 |
| 2013-04-08 | Houston | R16 | clay | John Isner | 7-5 6-7 7-6 |
| 2012-07-16 | Atlanta | QF | hard | John Isner | 7-6 6-4 |
Averages over each player's completed matches in the selected window (99 vs 94). 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