Dominican Republic: M25 Santo Domingo - Singles - Main |
| 1/16-finals | Hijikata R. | Okala J. | 1:0 RET. (6:3, 4:2) | details | 23.02.2022 |
Mexico: M25 Cancun 2 - Singles - Main |
| 1/16-finals | Okala J. | Smith K. | 0:2 (4:6, 3:6) | details | 15.02.2022 |
Brazil: Blumenau - Singles - Main |
| 1/16-finals | Rodriguez C. | Okala J. | 2:1 (3:6, 6:1, 6:2) | details | 10.01.2022 |
Turkey: M15 Antalya 22 - Singles - Main |
| 1/16-finals | Okala J. | Rondoni P. | 0:2 (61:7, 4:6) | details | 01.06.2021 |
France: Lille - Singles - Qualification |
| Semi-finals | Okala J. | Crepatte B. | 1:1 RET. (7:5, 63:7, 0:3) | details | 21.03.2021 |
Spain: M15 Manacor 3 - Singles - Main |
| 1/8-finals | Okala J. | Martineau M. | 0:1 RET. (3:6, 1:2) | details | 14.01.2021 |
| 1/16-finals | Okala J. | Ozolins K. | 2:1 (3:6, 6:4, 6:1) | details | 13.01.2021 |
Spain: M15 Manacor (Mallorca) - Singles - Main |
| Semi-finals | Bellier A. | Okala J. | 2:0 (7:65, 6:1) | details | 10.01.2021 |
| Quarter-finals | Okala J. | Barroso Campos A. | 2:1 (6:3, 66:7, 6:2) | details | 09.01.2021 |
| 1/8-finals | Okala J. | Ktiri M. | 2:1 (6:4, 5:7, 6:2) | details | 07.01.2021 |
| 1/16-finals | Okala J. | Tatlot J. S. | 2:0 (6:3, 6:2) | details | 05.01.2021 |
France: M25+H Rodez - Singles - Main |
| 1/16-finals | De Schepper K. | Okala J. | 2:0 (6:4, 6:3) | details | 14.10.2020 |
Czech Republic: M25 Pardubice - Singles - Main |
| 1/16-finals | Baez S. | Okala J. | 2:0 (7:66, 6:2) | details | 30.09.2020 |
Italy: Forli - Singles - Main |
| 1/16-finals | Okala J. | Seppi A. | 0:2 (65:7, 2:6) | details | 22.09.2020 |
Czech Republic: M25 Prague - Singles - Main |
| 1/8-finals | Okala J. | Miedler L. | 0:2 (3:6, 5:7) | details | 17.09.2020 |
| 1/16-finals | Vocel M. | Okala J. | 0:1 RET. (4:6, 0:1) | details | 16.09.2020 |
Switzerland: M15 Caslano - Singles - Main |
| 1/16-finals | Lama G. | Okala J. | 2:1 (2:6, 6:0, 6:3) | details | 02.09.2020 |
World: UTR Pro Match Series - Singles - Main |
| | Okala J. | Parker S. | 1:2 (6:2, 2:6, 7:10) | details | 16.07.2020 |
| | Okala J. | Petit G. | 2:0 (7:5, 6:2) | details | 15.07.2020 |
| | Okala J. | Laurent T. | 0:2 (1:6, 1:6) | details | 14.07.2020 |
Spain: M25 Murcia - Singles - Main |
| 1/8-finals | Granollers G. | Okala J. | 1:0 RET. (6:2, 2:1) | details | 05.03.2020 |
| 1/16-finals | Mina G. | Okala J. | 0:2 (3:6, 1:6) | details | 03.03.2020 |
Turkey: M25 Antalya - Singles - Main |
| 1/8-finals | Okala J. | Forejtek J. | 0:2 (2:6, 3:6) | details | 27.02.2020 |
| 1/16-finals | Okala J. | Aksu C. | 2:0 (7:5, 6:3) | details | 26.02.2020 |
Turkey: M15 Antalya 7 - Singles - Main |
| Semi-finals | Forejtek J. | Okala J. | 2:0 (6:1, 6:2) | details | 22.02.2020 |
| Quarter-finals | Makk P. | Okala J. | 1:2 (7:5, 4:6, 2:6) | details | 22.02.2020 |
| 1/8-finals | Marozsan F. | Okala J. | 0:2 (4:6, 3:6) | details | 20.02.2020 |
| 1/16-finals | Fajta P. | Okala J. | 0:2 (5:7, 62:7) | details | 19.02.2020 |
Spain: M15 Palmanova - Singles - Main |
| Final | Okala J. | Sanchez Izquierdo N. | 1:2 (6:4, 2:6, 2:6) | details | 16.02.2020 |
| Semi-finals | Okala J. | Baez S. | 2:0 (6:2, 7:5) | details | 15.02.2020 |
| Quarter-finals | Okala J. | Vives Marcos P. | 2:0 (7:60, 6:4) | details | 14.02.2020 |
| 1/8-finals | Okala J. | Chepelev A. | 2:0 (6:4, 6:2) | details | 13.02.2020 |
| 1/16-finals | Okala J. | March A. C. | 2:0 (6:4, 6:0) | details | 11.02.2020 |
Egypt: M15 Cairo 3 - Singles - Main |
| Semi-finals | Okala J. | Tiurnev E. | 0:2 (1:6, 4:6) | details | 01.02.2020 |
| Quarter-finals | Okala J. | Dzhavakian Y. | 2:0 (6:0, 6:1) | details | 31.01.2020 |
| 1/8-finals | Okala J. | Seateun N. | 2:1 (2:6, 7:5, 6:4) | details | 30.01.2020 |
| 1/16-finals | Okala J. | Ferrari G. | 2:0 (6:4, 6:0) | details | 29.01.2020 |
Tunisia: M15 Monastir 2 - Singles - Main |
| Quarter-finals | Okala J. | Laurent T. | 0:2 (4:6, 2:6) | details | 17.01.2020 |
| 1/8-finals | Okala J. | Angele J. F. | 1:0 RET. (7:65, 2:0) | details | 16.01.2020 |
| 1/16-finals | Okala J. | Vylegzhanin N. | 2:1 (3:6, 6:3, 6:4) | details | 15.01.2020 |
Spain: Barcelona - Singles - Main |
| 1/32-finals | Lopez-Perez E. | Okala J. | 2:0 (6:3, 6:4) | details | 01.10.2019 |
Italy: Florence - Singles - Main |
| 1/16-finals | Okala J. | Giannessi A. | 0:2 (3:6, 0:6) | details | 25.09.2019 |