Head to head
0
Hard
2
4
Clay
2
0
Grass
1
Luis Horna's wins on the left · Agustin Calleri's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (9)
| 2008 | Acapulco | Clay | QF | Luis Horna | 6-4 3-6 6-3 |
| 2008 | Buenos Aires | Clay | R16 | Agustin Calleri | 3-6 6-2 6-2 |
| 2008 | Vina del Mar | Clay | R32 | Luis Horna | 6-4 6-4 |
| 2008 | Australian Open | Hard | R128 | Agustin Calleri | 6-4 6-7(6) 6-3 6-4 |
| 2007 | Wimbledon | Grass | R128 | Agustin Calleri | 6-2 7-6(4) 7-5 |
| 2006 | Acapulco | Clay | QF | Luis Horna | 6-3 6-4 |
| 2004 | Acapulco | Clay | R32 | Luis Horna | 7-6(5) 6-4 |
| 2004 | Costa do Sauipe | Clay | SF | Agustin Calleri | 6-4 5-7 6-1 |
| 2001 | Salvador | Hard | R32 | Agustin Calleri | 6-0 7-6(4) |
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.