Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Cairo | 2021/08/30 12:30 | Gonzalo Achondo v Lorenzo Gagliardo | 4-6,0-6 |
| ITF M15 Bad Waltersdorf | 2021/08/23 07:00 | Gonzalo Achondo v Philip Bachmaier | 0-6,3-6 |
| ITF M15 Warmbad-Villach | 2021/08/16 12:30 | Philip Bachmaier v Gonzalo Achondo | 6-1,6-3 |
| ITF M15 Warmbad-Villach | 2021/08/16 07:00 | Ivan Kazakov v Gonzalo Achondo | 6-3,0-6,8-10 |
| ITF M15 Xativa | 2021/08/02 07:00 | Francisco Andreu Garcia v Gonzalo Achondo | 6-3,6-1 |
| ITF USA F40 Qual | 2017/12/03 18:00 | Gonzalo Achondo v Mason Beiler | 3-6,0-6 |
| ITF USA F40 Qual | 2017/12/02 16:00 | Jack Vance v Gonzalo Achondo | 3-6,6-4,4-6 |
| ITF USA F39 Qual | 2016/11/26 18:00 | Noe Khlif v Gonzalo Achondo | 6-3,6-3 |
| ITF M15 Novi Sad | 2021/08/01 11:15 | Marko Stakusic v Petar Jovanovic | 5-7,3-6 |
| ITF M15 Novi Sad | 2021/07/25 12:00 | Marko Stakusic v Nikolas Lahky | 3-6,5-7 |
| ITF M15 Doboj | 2021/07/13 08:00 | Vladan Tadic v Marko Stakusic | 6-3,6-4 |
| ITF M15 Sarajevo | 2021/06/02 14:30 | Gauthier Onclin v Marko Stakusic | 6-1,6-1 |
| ITF M25 Kiseljak | 2021/05/25 12:55 | Gorazd Srbljak v Marko Stakusic | 4-6,6-3,6-2 |
| Challenger Granby | 2019/07/22 13:00 | Hunter Reese v Marko Stakusic | 6-4,7-5 |
| ITF Canada F7 | 2018/09/08 13:00 | Gabriel Diallo v Marko Stakusic | 6-2,6-4 |