Stadium: Court 4 Round: 25 Ground: Clay
| ITF Spain F1 | 2018/01/20 11:50 | Munoz-De la Nava, Daniel v Yunseong Chung | 6-4,6-3 |
| ITF Spain F1 | 2018/01/19 10:00 | Gigounon, Germain v Yunseong Chung | 5-7,3-6 |
| ITF Spain F1 | 2018/01/17 09:00 | Mikhail Korovin v Yunseong Chung | 5-7,1-6 |
| ITF Spain F1 | 2018/01/15 10:30 | Yunseong Chung v Meis, Pascal | 6-0,6-2 |
| ITF Thailand F11 | 2017/12/05 08:00 | Wishaya Trongcharoenchaikul v Yunseong Chung | 3-6,7-5,7-6 |
| ITF Thailand F11 | 2017/12/05 04:30 | Wishaya Trongcharoenchaikul v Yunseong Chung | 3-6,7-5,7-6 |
| ITF Thailand F10 | 2017/11/29 03:00 | Podzus, Martins v Yunseong Chung | 6-2,6-3 |
| ITF Thailand F10 | 2017/11/28 03:00 | Isarow, Pruchya v Yunseong Chung | 7-5,5-7,2-6 |
| ITF Spain F2 | 2018/01/22 09:00 | Luca Giacomini v Mertens, Nico | 6-3,1-6,4-6 |
| ITF Spain F2 | 2018/01/21 08:30 | Mrazek, David v Mertens, Nico | 2-6,3-6 |
| ITF Spain F2 | 2018/01/20 10:15 | Miralles, Lluis v Mertens, Nico | 1-6,0-6 |
| ITF Turkey F45 | 2017/12/01 07:15 | Mertens, Nico v Hampel, Lenny | 1-6,0-6 |
| ITF Turkey F45 | 2017/11/30 07:15 | Mertens, Nico v Klimov, Daniil | 6-1,6-0 |
| ITF Turkey F45 | 2017/11/29 10:00 | Jan Choinski v Mertens, Nico | 5-7,6-7 |
| ITF Turkey F45 Qual | 2017/11/27 08:30 | Mertens, Nico v Franco Ribero | 6-4,6-0 |
| ITF Turkey F45 Qual | 2017/11/26 06:30 | Mertens, Nico v Nadaf, Hamid Reza | 7-5,6-1 |