Stadium: Court 6 Round: 24 Ground: Hardcourt outdoor
| 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 Buenos Aires | 2018/11/16 18:10 | Guilherme Clezar v Federico Coria | 6-7,5-7 |
| Challenger Buenos Aires | 2018/11/15 17:00 | Martin Cuevas v Guilherme Clezar | 4-6,1-6 |
| Challenger Buenos Aires | 2018/11/12 16:05 | Miljan Zekic v Guilherme Clezar | 3-6,2-6 |
| 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 |
| Challenger Tiburon | 2018/09/22 21:55 | Renzo Olivo v Harri Heliovaara | 6-2,3-6,7-6 |
| Davis Cup | 2018/09/15 09:40 | Mohamed Safwat v Harri Heliovaara | 6-2,6-4 |