| 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 | Cancelled | |
| 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 | |
| ITF M15 Les Franqueses | 03/16 09:00 | 26 | Nikolas Sanchez Izquierdo v Luke Simkiss | Cancelled | |
| ITF M15 Les Franqueses | 03/15 09:30 | 27 | Nikolas Sanchez Izquierdo v Adria Soriano Barrera | Retired | |
| ITF M15 Les Franqueses | 03/14 09:30 | 26 | Nikolas Sanchez Izquierdo v Ronetto Van Tilburg | 4-6,7-6,7-5 | |
| ITF M15 Les Franqueses | 03/12 11:03 | 25 | Nikolas Sanchez Izquierdo v Albert Pedrico Kravtsov | 6-3,6-4 | |
| ITF M15 Torello | 03/06 13:30 | 25 | Nikolas Sanchez Izquierdo v Diego F Flores | 3-6,4-6 | |
| Challenger Tenerife | 02/20 18:25 | 25 | [282] Nikolas Sanchez Izquierdo v Martin Damm [212] | Cancelled | |
| ATP Marseille | 02/04 15:55 | 14 | [110] Giulio Zeppieri v Nikolas Sanchez Izquierdo [281] | 7-5,6-2 | |
| Challenger Piracicaba | 01/30 18:25 | 25 | [281] Nikolas Sanchez Izquierdo v Kilian Feldbausch [452] | 4-6,4-6 | |
| Challenger Punta del Este | 01/25 18:00 | 26 | [138] Juan M Cerundolo v Nikolas Sanchez Izquierdo [292] | 6-1,6-3 | |
| Challenger Punta del Este | 01/23 21:40 | 25 | [292] Nikolas Sanchez Izquierdo v Tomas Barrios Vera [93] | 3-6,6-4,6-4 | |
| Challenger Punta del Este | 01/22 16:00 | 19 | [292] Nikolas Sanchez Izquierdo v Orlando Luz [370] | 4-6,6-1,6-4 | |
| Challenger Punta del Este | 01/21 14:00 | 14 | [292] Nikolas Sanchez Izquierdo v Juan Bautista Torres [382] | 5-7,6-3,6-4 | |
| Challenger Buenos Aires | 01/18 17:50 | 26 | [292] Nikolas Sanchez Izquierdo v Andrea Collarini [236] | 6-3,2-6,3-6 | |
| Challenger Buenos Aires | 01/16 20:45 | 25 | [370] Orlando Luz v Nikolas Sanchez Izquierdo [292] | 3-6,6-2,1-6 | |
| Challenger Buenos Aires | 01/09 13:00 | 25 | [327] Timo Stodder v Nikolas Sanchez Izquierdo [290] | 6-2,7-6 | |
| Challenger Maspalomas | 11/28 11:25 | 25 | [193] Daniel Rincon v Nikolas Sanchez Izquierdo [289] | 6-2,7-5 | |
| Challenger Valencia | 11/20 10:00 | 19 | [250] Pierre-Hugues Herbert v Nikolas Sanchez Izquierdo [285] | 0-6,7-6,6-1 | |
| Challenger Valencia | 11/19 11:40 | 14 | Ignacio Parisca v Nikolas Sanchez Izquierdo | 5-7,0-6 |
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.