| Player Info |
| Horna claimed the French Open men's doubles title with Pablo Cuevas. (updated 6/7/2008) |
| 2008 Results | |||
| Australian Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Agustin Calleri | L | 4-6,7-6(8-6),3-6,4-6 |
| Movistar Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Agustin Calleri | W | 6-4,6-4 |
| 2 | Carlos Berlocq | L | 6-7(3-7),6-3,6-7(3-7) |
| Copa Telmex | |||
| Rd | Opponent | W/L | Score |
| 1 | Maximo Gonzalez | W | 6-4,6-4 |
| 2 | Agustin Calleri | L | 6-3,2-6,2-6 |
| Abierto Mexicano Telcel | |||
| Rd | Opponent | W/L | Score |
| 1 | Fabio Fognini | W | 6-4,7-5 |
| 2 | Juan Monaco | W | 7-6(7-4),6-3 |
| QF | Agustin Calleri | W | 6-4,3-6,6-3 |
| SF | David Nalbandian | L | 5-7,1-6 |
| Pacific Life Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Sam Querrey | L | 6-7(5-7),3-6 |
| Open de Tenis Comunidad Valenciana | |||
| Rd | Opponent | W/L | Score |
| 1 | Mischa Zverev | L | 3-6,7-6(7-5),4-6 |
| Campionati BNL Italia | |||
| Rd | Opponent | W/L | Score |
| 1 | Richard Gasquet | W | 6-4,6-1 |
| 2 | Jose Acasuso | W | 6-3,7-6(7-1) |
| 3 | Radek Stepanek | L | 4-6,6-1,3-6 |
| Masters Series Hamburg | |||
| Rd | Opponent | W/L | Score |
| 1 | Potito Starace | L | 3-6,2-4,retired |
| French Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Scoville Jenkins | W | 6-4,5-7,6-3,6-0 |
| 2 | Gael Monfils | L | 6-7(5-7),4-6,5-7 |
| Wimbledon | |||
| Rd | Opponent | W/L | Score |
| 1 | Roko Karanusic | L | 6-7(4-7),3-6,1-6 |
| Allianz Suisse Open Gstaad | |||
| Rd | Opponent | W/L | Score |
| 1 | Jeremy Chardy | L | 6-7(5-7),7-6(8-6),5-7 |
| Austrian Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Jurgen Melzer | L | 3-6,1-6 |
| Legg Mason Tennis Classic | |||
| Rd | Opponent | W/L | Score |
| 1 | Donald Young | L | 3-6,1-6 |
| Pilot Pen Tennis | |||
| Rd | Opponent | W/L | Score |
| 1 | Robby Ginepri | L | 6-7(4-7),2-6 |
| US Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Philipp Kohlschreiber | L | 2-6,3-6,2-6 |