Stadium: Court 15 Round: 29 Ground: Hardcourt indoor
| ITF - M15 Bressuire | 2019/01/17 11:00 | Heyman, Christopher v Mertens, Yannick | 3-6,0-6 |
| ITF Israel F15 Qual | 2017/11/03 09:50 | Heyman, Christopher v Mertens, Yannick | 6-7,6-3,2-6 |
| ITF Israel F15 | 2017/11/03 08:00 | Heyman, Christopher v Mertens, Yannick | 6-7,6-3,2-5 |
| France F4, Singles | 2017/03/03 09:30 | Mertens, Yannick v Heyman, Christopher | 6-4,6-4 |
| ITF M25 Plaisir | 2019/09/21 11:30 | Heyman, Christopher v Bergevi, Filip | 6-3,7-5 |
| ITF M25 Plaisir | 2019/09/20 11:30 | Heyman, Christopher v Antoine Bellier | 6-1,6-4 |
| ITF M25 Plaisir | 2019/09/19 09:50 | Heyman, Christopher v Samuelsson, Christian | 6-4,6-2 |
| Mulhouse, Singles M-ITF-FRA-16A | 2019/09/10 12:55 | Simon, Tobias v Heyman, Christopher | 7-6,6-4 |
| Challenger Meerbusch | 2019/08/12 12:35 | Jelle Sels v Heyman, Christopher | 6-2,3-6,6-1 |
| Brussels, Singles M-ITF-BEL-03A | 2019/08/04 12:00 | Heyman, Christopher v Guy Den Heijer | 2-6,6-0,6-4 |
| Brussels, Singles M-ITF-BEL-03A | 2019/08/03 11:00 | Heyman, Christopher v Nick Hardt | 6-2,6-3 |
| Brussels, Singles M-ITF-BEL-03A | 2019/08/02 13:15 | Heyman, Christopher v Boehler, Dominik | 7-6,6-4 |
| ITF M25 Plaisir | 2019/09/21 14:30 | Mertens, Yannick v Jacq, Gregoire | 6-4,7-6 |
| ITF M25 Plaisir | 2019/09/20 11:30 | Mertens, Yannick v Valentin Royer | 7-6,6-3 |
| ITF M25 Plaisir | 2019/09/19 11:30 | Mertens, Yannick v Joffrey De Schepper | 6-1,4-6,6-4 |
| ITF M25 Plaisir | 2019/09/18 11:30 | Mertens, Yannick v Meehan, Harry David | 6-3,6-2 |
| Istanbul, Turkey | 2019/09/10 09:45 | Mertens, Yannick v Hoyt, Evan | 5-7,6-4,6-7 |
| ITF M25 Bagneres-De-Bigorre | 2019/09/07 14:25 | Struvay, Eduardo v Mertens, Yannick | 6-4,6-4 |
| ITF M25 Bagneres-De-Bigorre | 2019/09/06 12:30 | Mertens, Yannick v Arthur Reymond | 3-6,6-3,6-4 |
| ITF M25 Bagneres-De-Bigorre | 2019/09/05 17:05 | Mertens, Yannick v Patael, Ben | 6-4,3-6,6-4 |