Stadium: Center Court Round: 24 Ground: Clay
| Zhangjiagang, China | 2019/03/19 04:40 | Xia, Zihao v James Duckworth | 0-6,3-6 |
| Zhangjiagang, China | 2019/03/18 03:10 | Xia, Zihao v Wang, Tak Khunn | 1-6,7-6,6-3 |
| Challenger - Shenzhen | 2019/03/11 03:50 | Xia, Zihao v Duckhee Lee | 3-6,1-6 |
| Challenger Zhuhai | 2019/03/05 02:00 | Xia, Zihao v Max Purcell | 7-6,5-7,1-6 |
| Challenger Yokohama | 2019/02/26 01:00 | Duckhee Lee v Xia, Zihao | 6-0,6-3 |
| Challenger Canberra | 2019/01/06 04:25 | Thomas Fancutt v Xia, Zihao | 6-3,6-2 |
| Hong Kong, Simples M-ITF-HKG-04A | 2019/01/02 06:35 | Xia, Zihao v Kuan-Yi Lee | 1-6,2-6 |
| ITF Hong Kong F3 | 2018/12/25 03:45 | Arthur Rinderknech v Xia, Zihao | 6-7,6-3,6-2 |
| Challenger - Taipei | 2019/04/08 10:25 | Robert, Stephane v Goncalo Oliveira | 6-3,6-4 |
| Alicante, Spain | 2019/04/01 16:30 | Goncalo Oliveira v Lorenzo Giustino | 6-3,4-6,3-6 |
| Challenger St Brieuc | 2019/03/26 12:00 | Manuel Guinard v Goncalo Oliveira | 7-5,6-1 |
| Zhangjiagang, China | 2019/03/20 02:00 | Goncalo Oliveira v Ignatik, Uladzimir | 3-6,2-6 |
| Zhangjiagang, China | 2019/03/19 04:05 | Yibing Wu v Goncalo Oliveira | 2-6,6-2,2-6 |
| Challenger Zhuhai | 2019/03/04 07:10 | Kaichi Uchida v Goncalo Oliveira | 6-3,7-6 |
| Challenger Yokohama | 2019/02/26 02:20 | Goncalo Oliveira v Ivan Gakhov | 3-6,6-7 |
| Bangkok II, Thailand | 2019/02/20 03:00 | Goncalo Oliveira v Soonwoo Kwon | 2-6,7-6,1-6 |