Round: 25 Ground: Clay
| ITF Spain F26 Qual | 2015/08/16 08:00 | Nuno Borges v Luis F Labarta | 6-1,6-1 |
| ITF Spain F24 | 2015/08/01 17:00 | Luis F Labarta v Marco Neubau | 0-6,3-6 |
| ITF Japan F5 | 2016/04/06 04:15 | Masato Shiga v Yusuke Watanuki | 7-6,6-4 |
| ITF Japan F1 | 2016/03/10 02:45 | Katsuki Nagao v Yusuke Watanuki | 1-6,6-2,1-6 |
| ITF Turkey F5 | 2016/02/03 08:00 | Germain Gigounon v Yusuke Watanuki | 6-1,4-6,6-4 |
| ITF Turkey F4 | 2016/01/26 11:05 | Yusuke Watanuki v Tallon Griekspoor | 3-6,1-6 |
| ITF Turkey F3 | 2016/01/22 13:40 | Joris De Loore v Yusuke Watanuki | 6-3,6-0 |
| ITF Turkey F3 | 2016/01/22 09:00 | Altug Celikbilek v Yusuke Watanuki | 3-6,6-7 |
| ITF Turkey F3 | 2016/01/19 08:00 | Hannes Wagner v Yusuke Watanuki | 5-7,1-6 |
| ITF Australia F7 | 2015/10/08 03:00 | Yusuke Watanuki v Finn Tearney | 6-1,1-6,3-6 |