Stadium: Court 6 Round: 24 Ground: Hardcourt outdoor
| Challenger Shenzhen | 2019/03/12 02:00 | Guilherme Clezar v Max Purcell | 6-7,6-7 |
| Challenger Zhuhai | 2019/03/07 08:20 | Guilherme Clezar v Hiroki Moriya | 3-6,4-6 |
| Challenger Zhuhai | 2019/03/06 09:35 | Guilherme Clezar v Runhao Hua | 6-2,4-6,7-5 |
| Challenger Yokohama | 2019/02/26 08:05 | Guilherme Clezar v Gastao Elias | 6-0,2-6,6-7 |
| Challenger Launceston | 2019/01/29 02:00 | Guilherme Clezar v Tsung-Hua Yang | 5-7,6-7 |
| Challenger Burnie | 2019/01/23 03:20 | Guilherme Clezar v Jeremy Beale | 2-6,4-6 |
| Australian Open | 2019/01/08 03:30 | Guilherme Clezar v Rudolf Molleker | 6-7,6-7 |
| Challenger Noumea | 2018/12/31 01:50 | Tomas Barrios Vera v Guilherme Clezar | 4-6,6-2,6-3 |
| Challenger Zhangjiagang | 2019/03/18 02:00 | Harri Heliovaara v Luca Margaroli | 2-6,6-3,6-1 |
| Challenger Zhuhai | 2019/03/05 03:45 | Yunseong Chung v Harri Heliovaara | 7-5,6-2 |
| Challenger Zhuhai | 2019/03/04 02:00 | Harri Heliovaara v Haitong Xia | 6-1,6-4 |
| Challenger Champaign | 2018/11/13 16:00 | Harri Heliovaara v Mikael Torpegaard | 3-6,7-5,6-4 |
| Challenger Charlottesville | 2018/10/27 14:00 | Marcos Giron v Harri Heliovaara | 3-6,6-1,6-1 |
| Challenger Stockton | 2018/10/01 17:00 | Harri Heliovaara v Alexander Sarkissian | 6-4,4-6,4-6 |
| Challenger Stockton | 2018/09/30 19:35 | Harri Heliovaara v Sem Verbeek | 6-1,6-4 |
| Challenger Stockton | 2018/09/29 20:30 | Harri Heliovaara v Ruan Roelofse | 7-6,6-1 |