Round: 26 Ground: Clay
| Challenger Meerbusch | 2015/08/18 14:00 | Arguello, Facundo v Greven, Marvin | 6-2,7-5 |
| Challenger Prague 2 | 2015/08/11 12:25 | Mektic, Nikola v Arguello, Facundo | 3-6,6-0,6-1 |
| Challenger Padova | 2015/06/30 16:35 | Arguello, Facundo v Volandri, Filippo | 0-6,3-6 |
| Wimbledon Qual | 2015/06/24 11:40 | Pierre-Hugues Herbert v Arguello, Facundo | 6-3,6-4 |
| Wimbledon Qual | 2015/06/22 14:30 | Mina, Gianni v Arguello, Facundo | 3-6,7-5,6-8 |
| Challenger - Bordeaux | 2015/05/12 16:15 | Arguello, Facundo v Lucas Pouille | 6-4,2-6,2-6 |
| Challenger - Tallahassee | 2015/05/02 17:20 | Frances Tiafoe v Arguello, Facundo | 6-2,6-7,4-6 |
| Challenger - Tallahassee | 2015/05/01 21:40 | Donaldson, Jared v Arguello, Facundo | 3-6,2-6 |
| Challenger Meerbusch | 2015/08/18 11:25 | Saez, Juan Carlos v Dennis Novak | 6-1,6-2 |
| Coupe Davis | 2015/07/19 14:00 | Saez, Juan Carlos v Hank, Tigre | 6-4,6-2 |
| Coupe Davis | 2015/07/17 14:00 | Saez, Juan Carlos v Gomez, Lucas | 4-6,6-0,5-7,7-6,6-1 |
| Milan, Italy | 2015/06/24 11:20 | Marco Cecchinato v Saez, Juan Carlos | 7-5,6-3 |
| Milan, Italy | 2015/06/22 11:00 | Saez, Juan Carlos v Baldi, Filippo | 6-3,6-0 |
| ITF Romania F4 | 2015/05/28 07:00 | Saez, Juan Carlos v Reuter, Yannik | 6-7,3-6 |
| ITF Romania F3 | 2015/05/21 08:30 | Saez, Juan Carlos v Dmitry Popko | 6-3,2-6,2-6 |
| ITF Romania F3 | 2015/05/20 07:00 | Saez, Juan Carlos v Antonescu, Vasile | 6-0,6-4 |