Estadio: Court 1 Round: 27 Ground: Clay
| ITF M15 Benicarlo | 2019/10/25 08:00 | Alvaro Lopez San Martin v Johan Nikles | 4-6,7-5,6-0 |
| ITF Italia F32 | 2018/10/15 13:45 | Alvaro Lopez San Martin v Johan Nikles | 6-4,6-4 |
| ITF M25 Oviedo | 2021/09/01 14:20 | Johan Nikles v Julio Cesar Porras | 7-5,6-4 |
| ITF M25 Oviedo | 2021/08/31 10:00 | Johan Nikles v Federico Zeballos | 7-6,6-2 |
| Challenger de Varsovia | 2021/08/25 10:30 | Johan Nikles v Jozef Kovalik | 3-6,4-6 |
| Challenger de Varsovia | 2021/08/24 11:30 | Johan Nikles v Jonathan Mridha | 6-4,6-7,6-3 |
| Challenger de Varsovia | 2021/08/22 13:35 | Johan Nikles v Lucas Gerch | 6-4,7-5 |
| ATP Gstaad | 2021/07/19 10:30 | Johan Nikles v Vit Kopriva | 2-6,1-6 |
| Challenger de Amersfoort | 2021/07/15 18:05 | Johan Nikles v Lukas Rosol | 2-6,1-6 |
| Challenger de Amersfoort | 2021/07/13 10:15 | Ryan Nijboer v Johan Nikles | 6-7,2-6 |
| ITF M25 Oviedo | 2021/09/01 14:40 | Carlos Lopez Montagud v Alvaro Lopez San Martin | 4-6,6-2,2-6 |
| ITF M25 Oviedo | 2021/08/31 14:15 | Alex M Pujolras v Alvaro Lopez San Martin | 4-6,2-6 |
| Challenger de Barletta | 2021/08/22 14:45 | Gabriele Piraino v Alvaro Lopez San Martin | 7-6,3-6,7-5 |
| ITF M25 Denia | 2021/07/30 15:00 | Nick Hardt v Alvaro Lopez San Martin | 6-0,6-3 |
| ITF M25 Denia | 2021/07/29 14:00 | Joris De Loore v Alvaro Lopez San Martin | 6-3,6-7,6-7 |
| ITF M25 Denia | 2021/07/28 08:00 | Pawel Juszczak v Alvaro Lopez San Martin | 6-7,6-7 |
| ITF M25 Gandia | 2021/07/24 14:30 | Javier Barranco Cosano v Alvaro Lopez San Martin | 7-5,6-3 |
| ITF M25 Gandia | 2021/07/23 08:00 | Alvaro Lopez San Martin v Francisco Andreu Garcia | 6-4,6-4 |