| ATP Barcelona | 04/13 13:10 | 45 | [119] Harold Mayot v Nikolas Sanchez Izquierdo [251] | 6-7,6-2,6-3 | |
| Challenger Madrid | 04/08 08:00 | 19 | Nikolas Sanchez Izquierdo v Daniel Merida Aguilar | CANC | |
| Challenger Madrid | 04/07 10:30 | 14 | [255] Nikolas Sanchez Izquierdo v Carlos Taberner [392] | Retired | |
| Challenger Barcelona | 04/03 11:45 | 26 | [255] Nikolas Sanchez Izquierdo v Jesper De Jong [155] | 3-6,4-6 | |
| Challenger Barcelona | 04/02 11:10 | 25 | David Naharro v Nikolas Sanchez Izquierdo | 1-6,0-6 | |
| Challenger Girona | 03/30 10:00 | 28 | [155] Radu Albot v Nikolas Sanchez Izquierdo [285] | 6-4,6-2 | |
| Challenger Girona | 03/30 09:00 | 27 | Joao Sousa v Nikolas Sanchez Izquierdo | Walkover | |
| Challenger Girona | 03/28 17:00 | 26 | [313] Gastao Elias v Nikolas Sanchez Izquierdo [285] | 7-5,3-6,4-6 | |
| Challenger Girona | 03/27 18:05 | 25 | [285] Nikolas Sanchez Izquierdo v Pablo Llamas Ruiz [152] | 4-6,6-3,6-3 | |
| Challenger Girona | 03/25 11:30 | 19 | [285] Nikolas Sanchez Izquierdo v Gastao Elias [313] | 4-6,6-0,4-6 | |
| Challenger Girona | 03/24 10:10 | 14 | [285] Nikolas Sanchez Izquierdo v Matthew C Romios [119] | 6-0,6-1 | |
| Challenger Murcia | 03/18 13:40 | 25 | [276] Mathias Bourgue v Nikolas S Izquierdo [285] | 7-5,6-3 |
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.