| ITF M15 - Anif | 08/28 07:55 | 27 | [415] Matias Franco Descotte v Nikolas S Izquierdo [357] | 2-6,3-6 | |
| ITF M15 - Anif | 08/27 08:00 | 26 | [445] Francesco Forti v Nikolas S Izquierdo [357] | 4-6,6-3,5-7 | |
| ITF M15 - Anif | 08/26 13:05 | 25 | Duje Ajdukovic v Nikolas S Izquierdo | 6-7,1-6 | |
| Challenger - Todi | 08/15 10:45 | 64 | [279] Borna Gojo v Nikolas S Izquierdo [356] | 6-4,6-0 | |
| Spanien - Summer League | 07/31 15:30 | - | [356] Nikolas S Izquierdo v Steven Diez [165] | 6-7,6-4,2-6 | |
| Spanien - Summer League | 07/30 15:00 | - | Nikolas S Izquierdo v Sergi Perez Contri | 6-2,6-1 | |
| Spanien - Summer League | 07/24 08:00 | - | [356] Nikolas S Izquierdo v Carlos Taberner [175] | 4-6,6-3,1-6 | |
| Spanien - Summer League | 07/23 11:15 | - | Nikolas S Izquierdo v Jose F Vidal Azorin | 5-7,6-3,6-2 | |
| Spanien - Summer League | 07/18 09:30 | - | [347] Oriol Roca Batalla v Nikolas S Izquierdo [356] | 6-4,6-2 | |
| Spanien - Summer League | 07/17 08:00 | - | [356] Nikolas S Izquierdo v Steven Diez [165] | Retired | |
| Spanien - Summer League | 07/16 12:00 | - | [356] Nikolas S Izquierdo v Benjamin Winter Lopez [443] | 6-7,6-1,6-0 | |
| ITF M25 - Murcia | 03/04 09:00 | 25 | [350] Nikolas S Izquierdo v Eduard Esteve Lobato [478] | 0-6,6-1,3-6 | |
| ITF M25 - Antalya | 02/27 08:25 | 26 | [358] Nikolas S Izquierdo v Dimitar Kuzmanov [316] | 1-6,4-6 | |
| ITF M25 - Antalya | 02/26 12:35 | 25 | [358] Nikolas S Izquierdo v Michael Vrbensky [396] | 6-2,4-6,6-4 | |
| ITF M15 - Antalya | 02/23 08:30 | 29 | [374] Nikolas S Izquierdo v Jonas Forejtek [476] | 4-6,3-6 | |
| ITF M15 - Antalya | 02/22 10:00 | 28 | [351] Maxime Hamou v Nikolas S Izquierdo [374] | 3-6,4-6 | |
| ITF M15 - Antalya | 02/22 07:00 | 27 | Nikolas S Izquierdo v Domagoj Biljesko | 7-5,4-6,6-2 | |
| ITF M15 - Antalya | 02/20 09:35 | 26 | Nikolas S Izquierdo v Calin Manda | 6-2,6-2 | |
| ITF M15 - Antalya | 02/19 10:00 | 25 | Nikolas S Izquierdo v Alessandro Ingarao | 6-3,6-2 | |
| ITF M15 - Palmanova | 02/16 09:00 | 29 | Jules Okala v Nikolas Sanchez Izquierdo | 6-4,2-6,2-6 | |
| ITF M15 - Palmanova | 02/15 10:45 | 28 | [413] Peter Heller v Nikolas S Izquierdo [375] | 2-6,0-6 | |
| ITF M15 - Palmanova | 02/14 08:55 | 27 | [446] Mathieu Perchicot v Nikolas S Izquierdo [375] | 3-6,5-7 | |
| ITF M15 - Palmanova | 02/13 09:00 | 26 | Francesco Passaro v Nikolas S Izquierdo | 2-6,5-7 | |
| ITF M15 - Palmanova | 02/11 11:45 | 25 | Alejandro Sanchez Gonzalez v Nikolas S Izquierdo | 1-6,3-6 | |
| ITF M15 - Cairo | 01/26 08:00 | 29 | [414] Nikolas S Izquierdo v Mathieu Perchicot [480] | 7-6,7-6 | |
| ITF M15 - Cairo | 01/25 08:30 | 28 | Nikolas S Izquierdo v Juan Pablo Paz | 6-2,7-6 | |
| ITF M15 - Cairo | 01/24 08:00 | 27 | Nikolas S Izquierdo v Marco Furlanetto | 6-2,6-3 | |
| ITF M15 - Cairo | 01/23 08:00 | 26 | Nikolas S Izquierdo v Dusan Rajic | 6-4,6-1 | |
| ITF M15 - Cairo | 01/22 08:00 | 25 | Nikolas S Izquierdo v Andrey Chepelev | 6-3,6-4 | |
| ITF M15 - Cairo | 01/19 08:30 | 29 | Javier Marti v Nikolas S Izquierdo | 6-2,2-6,7-6 |
Nikolás Sánchez Izquierdo (born 17 March 1999) is a Spanish tennis player.
Sánchez Izquierdo has a career high ATP singles ranking of 238 achieved on 19 September 2022 and a career high ATP doubles ranking of 562 achieved on 29 November 2021.