| ITF Tunisia F25 | 06/29 11:10 | 27 | Nikolas S Izquierdo v Nino Portales | 6-2,6-3 | |
| ITF Tunisia F25 | 06/28 10:10 | 26 | Andrey Chepelev v Nikolas S Izquierdo | 6-7,1-6 | |
| ITF Tunisia F25 | 06/27 08:30 | 25 | Nikolas S Izquierdo v Gabriele Maria Noce | 6-0,6-1 | |
| ITF Tunisia F24 | 06/19 12:55 | 25 | Nikolas S Izquierdo v Mikhail Korovin | 3-6,5-7 | |
| ITF Spain F13 | 05/29 10:40 | 25 | Enrique L Rico v Nikolas S Izquierdo | 3-6,6-2,6-4 | |
| ITF Spain F12 | 05/24 13:00 | 26 | Nikolas S Izquierdo v Alexander Zhurbin | 6-1,2-6,6-7 | |
| ITF Spain F12 | 05/22 12:20 | 25 | Aaron Cortes Alcaraz v Nikolas S Izquierdo | 6-7,6-2,6-7 | |
| ITF Spain F12 | 05/21 07:00 | 62 | Nikolas S Izquierdo v Louis Dussin | 6-3,4-6,6-4 | |
| ITF Spain F12 | 05/20 07:00 | 62 | Nikolas Sanchez Izquierdo v Arnau R Queralto | 6-0,6-2 | |
| ITF Spain F12 | 05/19 07:00 | 62 | Nikolas Sanchez Izquierdo v Ignacio A B Otarola | 6-4,6-2 | |
| ITF Spain F11 | 05/17 09:00 | 26 | Nikolas S Izquierdo v Jordi Samper-Montana | 1-6,4-6 | |
| ITF Spain F11 | 05/15 10:30 | 25 | Nikolas S Izquierdo v Sergiu D Medesan | 6-0,6-1 | |
| ITF Spain F11 | 05/14 09:00 | 62 | Nikolas S Izquierdo v Samy Grace | 6-4,7-6 | |
| ITF Spain F11 | 05/13 12:00 | 62 | Nikolas Sanchez Izquierdo v Pol Fernandez | 6-3,0-6,6-2 | |
| ITF Israel F6 | 05/10 07:00 | 26 | Nikolas S Izquierdo v Matias Franco Descotte | 0-6,2-6 | |
| ITF Israel F6 | 05/08 13:25 | 25 | Roi Ginat v Nikolas S Izquierdo | 2-6,3-6 | |
| ITF Israel F5 | 05/02 07:00 | 26 | Nikolas S Izquierdo v Nicolas Uryson | 3-6,2-6 | |
| ITF Israel F5 | 05/01 10:35 | 25 | Simon Carr v Nikolas S Izquierdo | 4-6,3-6 | |
| ITF Spain F9 | 04/17 09:50 | 25 | Miguel Semmler v Nikolas S Izquierdo | 6-4,7-6 | |
| ITF Spain F9 Qual | 04/16 10:25 | 62 | Nikolas S Izquierdo v Louis Chaix | 6-2,6-1 | |
| ITF Spain F9 Qual | 04/15 10:30 | 62 | Ryan Nijboer v Nikolas S Izquierdo | 3-6,3-6 | |
| ITF Spain F9 Qual | 04/14 12:15 | 62 | Alejandro Moro Canas v Nikolas Sanchez Izquierdo | 4-6,0-6 | |
| ITF Tunisia F12 | 03/26 11:30 | 62 | Nikolas S Izquierdo v Alex M Pujolras | 6-1,4-6,6-7 | |
| ITF Spain F7 | 03/19 09:30 | 25 | Aaron Cortes Alcaraz v Nikolas S Izquierdo | 6-2,6-1 | |
| ITF Tunisia F10 | 03/15 08:30 | 26 | Eduardo Agustin Torre v Nikolas S Izquierdo | 7-6,6-3 | |
| ITF Tunisia F10 | 03/13 09:40 | 25 | Nikolas S Izquierdo v Edoardo Lamberti | 6-0,6-4 | |
| ITF Tunisia F10 | 03/12 08:30 | 62 | Nikolas S Izquierdo v Loick Bruandet | 6-2,6-0 | |
| ITF Tunisia F10 | 03/11 10:30 | 62 | Nikolas S Izquierdo v Ludovico Scerrati | 6-1,6-3 | |
| ITF Spain F5 | 02/11 13:30 | 62 | Vasisht Cheruku v Nikolas S Izquierdo | 6-4,1-6,6-4 | |
| ITF Spain F5 | 02/10 13:30 | 62 | Zakhar Trapeznikov v Nikolas S Izquierdo | 4-6,1-6 |
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.