John Isner defeated Nicolas Almagro 7-5 6-3 in the Miami Masters round of 32 on hard. The upset overturned the form book — Nicolas Almagro came in leading the head-to-head 2–1, defending last year's round of 16. John Isner narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-04-08 | Houston | F | clay | John Isner | 6-3 7-5 |
| 2012-09-14 | Davis Cup WG SF: ESP vs USA | RR | clay | Nicolas Almagro | 6-4 4-6 6-4 3-6 7-5 |
| 2011-06-20 | Wimbledon | R64 | grass | Nicolas Almagro | 7-6 7-6 6-7 6-3 |
Averages over each player's completed matches in the selected window (200 vs 158). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About