Stadium: Court 5 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/04/18 14:00 | Harry Wendelken v Osgar O'Hoisin | 7-6,6-2 |
| ITF M15 Monastir | 2021/04/11 09:00 | Fons Van Sambeek v Osgar O'Hoisin | 6-3,6-2 |
| ITF M15 New Delhi | 2021/03/28 05:00 | Osgar O'Hoisin v Suraj R Prabodh | 6-3,5-7,5-10 |
| ITF M15 Indore | 2021/03/08 08:20 | Madhwin Kamath v Osgar O'Hoisin | 6-3,6-3 |
| ITF M15 Indore | 2021/03/08 03:30 | Osgar O'Hoisin v Gunjan Jadhav | 6-1,6-0 |
| ITF M15 Indore | 2021/03/07 03:30 | Sai K R Ganta v Osgar O'Hoisin | 3-6,1-6 |
| ITF M15 Lucknow | 2021/03/02 07:40 | Zane Khan v Osgar O'Hoisin | 6-3,6-3 |
| ITF M15 Lucknow | 2021/03/01 05:45 | Osgar O'Hoisin v Leonardo Catani | 6-2,6-1 |
| ITF M15 Monastir | 2021/04/18 12:00 | Vladimir Cherkovets v Maik Steiner | 1-6,2-6 |