| ITF M15 Marbella | 05/26 13:55 | 25 | Nicolas Alvarez Varona v Luis D C Villalpando | 6-2,6-1 | |
| ITF M15 Valldoreix | 05/12 12:05 | 25 | Alex M Pujolras v Nicolas Alvarez Varona | 6-7,6-2,6-1 | |
| ITF M15 Valldoreix | 05/11 08:00 | 62 | Nicolas Alvarez Varona v Oleg Prihodko | 6-7,6-4,11-9 | |
| ITF M15 Valldoreix | 05/10 08:00 | 62 | Nicolas Alvarez Varona v Axel Garcian | 6-1,6-4 | |
| ITF M15 Valldoreix | 05/09 12:00 | 62 | Nicolas Alvarez Varona v Luigi Castelletti | 6-2,7-6 | |
| ITF M15 Majadahonda | 05/06 10:30 | 26 | Pedro Vives Marcos v Nicolas Alvarez Varona | 6-3,6-7,6-4 | |
| ITF M15 Majadahonda | 05/04 07:00 | 25 | Nicolas Alvarez Varona v Corentin Denolly | 1-6,7-6,6-3 | |
| ITF M15 Torello | 12/09 10:50 | 25 | Nicolas Alvarez Varona v Mario G Fernandez | Retired | |
| ITF M15 Madrid | 12/03 09:00 | 25 | Inigo C Huegun v Nicolas Alvarez Varona | Cancelled | |
| ITF M15 Benicarlo | 11/29 10:00 | 29 | Nicolas Alvarez Varona v Ivan Gakhov | 7-6,6-4 | |
| ITF M15 Benicarlo | 11/28 12:55 | 28 | Nicolas Alvarez Varona v Marco Bortolotti | 3-6,6-3,7-5 | |
| ITF M15 Benicarlo | 11/27 09:00 | 27 | Nicolas Alvarez Varona v Lilian Marmousez | 6-3,4-6,6-2 | |
| ITF M15 Benicarlo | 11/26 09:00 | 26 | Felix Gill v Nicolas Alvarez Varona | 6-2,0-6,3-6 | |
| ITF M15 Benicarlo | 11/25 09:00 | 25 | Nicolas Alvarez Varona v Pedro Vives Marcos | 1-6,7-5,7-5 | |
| ITF M15 Villena | 11/19 10:00 | 26 | Nicolas Alvarez Varona v Javier Barranco Cosano | Retired | |
| ITF M15 Villena | 11/18 12:20 | 25 | Georgii Kravchenko v Nicolas Alvarez Varona | 4-6,7-6,3-6 | |
| Challenger Alicante | 10/10 10:00 | 64 | Malek Jaziri v Nicolas Alvarez Varona | 6-3,7-6 | |
| ITF M15 Castelo Branco | 09/26 10:25 | 28 | Nicolas A Varona v Lucas Catarina | 6-2,4-6,4-6 | |
| ITF M15 Castelo Branco | 09/25 10:20 | 27 | Tiago Cacao v Nicolas A Varona | 1-6,4-6 | |
| ITF M15 Castelo Branco | 09/24 14:10 | 26 | Nicolas A Varona v Mark Whitehouse | 7-5,6-4 | |
| ITF M15 Castelo Branco | 09/23 09:00 | 25 | Nicolas A Varona v Francisco Cabral | Retired | |
| ITF M15 Castelo Branco | 09/23 09:00 | 25 | Nicolas A Varona v Roy Smith | Cancelled | |
| ITF M15 Sintra | 09/19 11:30 | 28 | Sebastian Fanselow v Nicolas Alvarez Varona | 6-1,6-4 | |
| ITF M15 Sintra | 09/18 14:00 | 27 | Emilio Nava v Nicolas Alvarez Varona | 4-6,0-6 | |
| ITF M15 Sintra | 09/17 12:00 | 26 | Nicolas Alvarez Varona v Joao Monteiro | 6-2,3-6,6-4 | |
| ITF M15 Sintra | 09/16 10:10 | 25 | Savriyan Danilov v Nicolas Alvarez Varona | Retired | |
| ITF M15 Sintra | 09/14 14:55 | 44 | Nicolas Alvarez Varona v Mateus D C C Alves | 6-4,6-3 | |
| ITF M15 Sintra | 09/14 10:00 | 44 | Nicolas Alvarez Varona v Paulo Fernandes | 7-5,6-1 | |
| ITF M15 Sintra | 09/12 15:00 | 28 | Nicolas Alvarez Varona v Nuno Borges | 3-6,4-6 | |
| ITF M15 Sintra | 09/11 10:30 | 27 | Nicolas Alvarez Varona v Joao Monteiro | Retired |
Nicolás Álvarez Varona (born 18 May 2001) is a Spanish tennis player.
Álvarez Varona has a career high ATP singles ranking of World No. 219 achieved on 17 October 2022. He also has a career high ATP doubles ranking of World No. 288 achieved on 3 April 2023.
Álvarez Varona made his ATP main draw debut at the 2022 Barcelona Open Banc Sabadell after qualifying for the singles main draw, defeating Philipp Kohlschreiber and wildcard Max Alcalá Gurri before losing to Brandon Nakashima.
Ranked No. 927, at the 2024 Barcelona Open Banc Sabadell he entered the qualifying competition with a wildcard.