Head to head
1
Hard
0
1
Clay
1
0
Grass
1
John Isner's wins on the left · Nicolas Almagro's on the right · bar lengths share one scale
All meetings (4)
| 2014 | Miami Masters | Hard | R32 | John Isner | 7-5 6-3 |
| 2013 | Houston | Clay | F | John Isner | 6-3 7-5 |
| 2012 | Davis Cup WG SF: ESP vs USA | Clay | RR | Nicolas Almagro | 6-4 4-6 6-4 3-6 7-5 |
| 2011 | Wimbledon | Grass | R64 | Nicolas Almagro | 7-6(3) 7-6(5) 6-7(5) 6-3 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.