Stadium: Court 3 Round: 25 Ground: Grass
| Australian Open | 2018/01/17 02:20 | Ivo Karlovic v Yuichi Sugita | 7-6,6-7,7-5,4-6,12-10 |
| Challenger Seoul | 2019/05/01 05:20 | Yunseong Chung v Yuichi Sugita | 6-2,6-3 |
| Challenger Taipei | 2019/04/12 06:20 | Yuichi Sugita v Dennis Novak | 6-7,3-6 |
| Challenger Taipei | 2019/04/11 03:00 | Lukas Lacko v Yuichi Sugita | 6-3,3-6,4-6 |
| Challenger Taipei | 2019/04/09 13:50 | Cem Ilkel v Yuichi Sugita | 5-7,3-6 |
| Challenger Zhangjiagang | 2019/03/20 02:00 | Yunseong Chung v Yuichi Sugita | 4-6,7-5,6-2 |
| Challenger Shenzhen | 2019/03/12 07:20 | Duckhee Lee v Yuichi Sugita | 6-3,6-4 |
| Challenger Yokohama | 2019/03/02 02:00 | Soonwoo Kwon v Yuichi Sugita | 6-3,6-2 |
| Challenger Yokohama | 2019/03/01 02:00 | Yuichi Sugita v Dudi Sela | 2-6,6-4,7-5 |
| ATP Houston | 2019/04/08 20:00 | Ryan Harrison v Ivo Karlovic | 6-3,6-4 |
| ATP Miami | 2019/03/22 00:05 | Pablo Andujar v Ivo Karlovic | 7-6,6-4 |
| ATP Indian Wells | 2019/03/14 01:00 | Ivo Karlovic v Dominic Thiem | 4-6,3-6 |
| ATP Indian Wells | 2019/03/11 19:45 | Ivo Karlovic v Prajnesh Gunneswaran | 6-3,7-6 |
| ATP Indian Wells | 2019/03/09 20:45 | Borna Coric v Ivo Karlovic | 4-6,6-7 |
| ATP Indian Wells | 2019/03/07 20:40 | Ivo Karlovic v Matthew Ebden | 7-6,7-6 |
| ATP Delray Beach | 2019/02/19 16:00 | Radu Albot v Ivo Karlovic | 7-6,6-4 |
| ATP New York | 2019/02/13 16:00 | Ivo Karlovic v Radu Albot | 7-6,6-7,6-7 |