John Isner defeated Tommy Haas 6-4 6-7 7-6 in the Washington quarter-final on hard. The upset overturned the form book — Tommy Haas came in leading the head-to-head 3–2. John Isner narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-27 | Roland Garros | R32 | clay | Tommy Haas | 7-5 7-6(4) 4-6 6-7(10) 10-8 |
| 2013-02-11 | San Jose | SF | hard | Tommy Haas | 6-3 6-4 |
| 2009-08-16 | Cincinnati Masters | R64 | hard | John Isner | 7-6(5) 5-7 7-6(3) |
| 2008-07-14 | Indianapolis | R16 | hard | Tommy Haas | 6-3 6-4 |
| 2008-02-18 | San Jose | R16 | hard | John Isner | 4-6 7-6(6) 6-3 |
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 (200 vs 200). ATP, WTA & Challenger.