Head to Head includes singles and doubles results.
| 10/11/19 | Dionysios Kattis over Alex Thomas | 7-5; 5-7; 6-3 | |
| 08/27/19 | Alex Thomas over Dionysios Kattis | 3-6; 7-5; 6-4 | |
| 04/24/19 | Alex Thomas over Dionysios Kattis | 6-4; 6-4; 4-6 | |
| 08/31/18 | Alex Thomas over Dionysios Kattis | 4-6; 6-2; 7-5 |
