Challenger - San Marino 08/09 12:10 25 [252] Nikolas S Izquierdo v Alexandre Muller [145] 3-6,6-3,6-0
Challenger - Cordenons 08/03 12:50 25 [278] Ernests Gulbis v Nikolas S Izquierdo [250] 7-6,6-4
Challenger - San Benedetto 07/26 11:00 25 Gianmarco Ferrari v Nikolas S Izquierdo 7-6,7-6
Challenger Iasi 07/14 10:00 26 [258] Nikolas S Izquierdo v Felipe Meligeni Rodrigues Alves [169] 2-6,4-6
Challenger Iasi 07/12 07:30 25 [258] Nikolas S Izquierdo v Matteo Arnaldi [220] 6-2,6-3
Challenger - Troyes 07/01 13:00 27 [271] Nikolas S Izquierdo v Raul Brancaccio [323] 0-6,2-6
Challenger - Troyes 06/29 12:50 26 [226] Timofey Skatov v Nikolas S Izquierdo [271] 0-6,2-6
Challenger - Troyes 06/28 11:10 25 [362] Adrian Andreev v Nikolas S Izquierdo [271] 4-6,6-0,2-6
Challenger - Oeiras 06/23 10:30 26 [279] Nikolas S Izquierdo v Facundo Bagnis [110] 4-6,2-6
Challenger - Oeiras 06/21 12:35 25 [380] Alexandar Lazarov v Nikolas S Izquierdo [279] 6-2,2-6,4-6
Challenger - Blois 06/17 12:00 27 [298] Nikolas S Izquierdo v Luca Van Assche [383] 4-6,6-7
Challenger - Blois 06/16 09:30 26 [174] Nino Serdarusic v Nikolas S Izquierdo [298] 3-6,2-6
Challenger - Blois 06/14 10:55 25 [215] Cedrik-Marcel Stebe v Nikolas S Izquierdo [298] 2-6,3-6
Challenger - Blois 06/13 09:00 19 [254] Thiago Seyboth Wild v Nikolas S Izquierdo [298] 6-2,1-6,5-7
Challenger - Blois 06/12 08:30 14 [408] Sergey Fomin v Nikolas S Izquierdo [298] 7-5,2-6,4-6
ITF M25 - Mataro 05/25 12:15 25 [487] Alvaro Lopez San Martin v Nikolas S Izquierdo [286] 4-6,6-4,6-4
Challenger - Tunis 05/18 11:45 26 [266] Zhizhen Zhang v Nikolas S Izquierdo [289] 6-3,7-5
Challenger - Tunis 05/16 15:55 25 [289] Nikolas S Izquierdo v Alexey Vatutin [326] 6-3,2-6,7-5
Challenger - Heilbronn 05/09 09:30 19 [287] Nikolas S Izquierdo v Oleksii Krutykh [314] 4-6,4-6
Challenger - Heilbronn 05/08 09:30 14 Nikolas S Izquierdo v Liam Gavrielides 7-6,6-3
Challenger - Mauthausen 05/03 10:20 25 [85] John Millman v Nikolas S Izquierdo [297] 6-3,4-6,6-2
Challenger - Mauthausen 05/02 08:00 19 [297] Nikolas S Izquierdo v Mats Rosenkranz [344] 7-6,6-4
Challenger - Mauthausen 05/01 08:00 14 [286] Nikolas S Izquierdo v Maximilian Neuchrist [331] 7-6,6-1
ATP - Barcelona 04/16 12:05 45 [279] Nikolas S Izquierdo v Hugo Grenier [158] 2-6,2-6
Challenger - Oeiras 03/27 14:25 14 [267] Nikolas S Izquierdo v Kai Wehnelt [346] Retired
Challenger - Roseto 03/12 10:00 28 [105] Carlos Taberner v Nikolas S Izquierdo [300] 6-4,7-5
Challenger - Roseto 03/11 10:00 27 [300] Nikolas S Izquierdo v Lukas Rosol [288] 6-4,6-2
Challenger - Roseto 03/10 10:00 26 [118] Bernabe Zapata Miralles v Nikolas S Izquierdo [300] 5-7,6-0,3-6
Challenger - Roseto 03/08 12:50 25 Nikolas S Izquierdo v Francesco Maestrelli 7-5,1-6,6-2
Challenger - Roseto 03/07 10:00 19 [300] Nikolas S Izquierdo v Elmar Ejupovic [423] 6-1,6-4

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.