Home History
| Challenger Padova | 2014/06/23 10:45 | Ungur, Adrian v Steven Diez | 6-2,6-2 |
| Wimbledon Qual | 2014/06/16 13:40 | Steven Diez v Zhang, Ze | 6-4,3-6,2-6 |
| ITF Spain F9 | 2014/05/13 11:05 | Steven Diez v Giraldi Requena, Marcos | 6-2,6-0 |
| Challenger - Rome | 2014/05/06 12:25 | Arnaboldi, Andrea v Steven Diez | 6-1,6-0 |
| Challenger - Ostrava | 2014/04/28 12:05 | Mertl, Jan v Steven Diez | 6-3,6-2 |
| ATP Barcelona Qual | 2014/04/19 11:30 | Dominic Thiem v Steven Diez | 6-3,6-3 |
Away History
| ITF France F10 | 2014/06/10 15:00 | Semmler, Miguel v Joao Menezes | 4-6,5-7 |
| ITF Spain F12 | 2014/06/04 10:00 | Cristian Garin v Semmler, Miguel | 6-3,6-1 |
| ITF Spain F12 | 2014/06/03 10:35 | Semmler, Miguel v Federico Zeballos | 3-6,6-1,6-4 |
| Portugal F4, Singles Qualifying | 2014/05/15 09:00 | Ortega-Olmedo, Roberto v Semmler, Miguel | 6-1,6-2 |
| ITF Spain F7 | 2014/04/30 10:30 | Semmler, Miguel v Munoz-Abreu, Jordi | 6-3,7-6 |
| Spain F6, Singles | 2014/04/25 15:25 | Ojeda Lara, Ricardo v Semmler, Miguel | 6-4,6-3 |