Tommy Haas defeated John Isner 7-5 7-6 4-6 6-7 10-8 in the Roland Garros round of 32 on clay. The upset overturned the form book — John Isner came in leading the head-to-head 3–2, defending last year's round of 64. Tommy Haas narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 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 |
| 2007-07-29 | Washington | QF | hard | John Isner | 6-4 6-7(6) 7-6(5) |
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 (125 vs 200). ATP, WTA & Challenger.