Stadium: Court 3 Round: 25 Ground: Clay
| ITF Argentina F1 | 2018/05/14 15:00 | Makiguchi, Ryusei v Saez, Juan Carlos | 2-6,5-7 |
| ITF Argentina F1 | 2018/05/14 15:00 | Makiguchi, Ryusei v Saez, Juan Carlos | 2-6,5-7 |
| ITF Brazil F2 | 2018/05/01 20:35 | Makiguchi, Ryusei v 우고 카라벨리, 카밀로 | 2-6,0-6 |
| ITF Brazil F1 | 2018/04/25 18:15 | 레이트, 윌슨 v Makiguchi, Ryusei | 6-4,5-7,6-4 |
| ITF Brazil F1 | 2018/04/23 16:35 | Makiguchi, Ryusei v Silva, Caio | 6-1,6-7,7-5 |
| ITF Italy F6 Qual | 2018/04/01 12:00 | 워에르너, 파울 v Makiguchi, Ryusei | 6-4,6-4 |
| ITF Italy F6 Qual | 2018/03/31 12:00 | Makiguchi, Ryusei v 레이타노, 스테파노 | 7-5,6-2 |
| ITF Tunisia F12 | 2018/03/28 10:05 | Stefanini, Jacopo v Makiguchi, Ryusei | 6-1,2-6,6-4 |
| ITF Tunisia F11 | 2018/03/18 10:30 | Munoz-Abreu, Jordi v Makiguchi, Ryusei | 7-5,5-7,6-0 |
| ITF Argentina F1 | 2018/05/16 15:00 | 파르자트, 토마스 v Saez, Juan Carlos | 6-4,6-4 |
| ITF Argentina F1 | 2018/05/14 15:00 | Makiguchi, Ryusei v Saez, Juan Carlos | 2-6,5-7 |
| ITF Spain F10 | 2018/04/24 08:00 | Saez, Juan Carlos v 비렐라 마르티네즈, 마리오 | 4-6,4-6 |
| ITF Spain F9 | 2018/04/20 09:30 | 캐친, 페드로 v Saez, Juan Carlos | 2-6,6-1,6-2 |
| ITF Spain F9 | 2018/04/18 09:00 | 데 크롬, 미치엘 v Saez, Juan Carlos | 5-7,0-6 |
| Tunisia F14, Singles Qualifying | 2018/04/10 11:00 | 블벤스키, 미가엘 v Saez, Juan Carlos | 6-2,6-4 |
| ITF Tunisia F13 | 2018/04/05 09:00 | 보셀, 마테이 v Saez, Juan Carlos | 6-3,6-2 |
| ITF Tunisia F13 | 2018/04/03 09:00 | 사라이바, 베르날도 v Saez, Juan Carlos | 7-6,4-6,6-7 |