| Challenger - Zagreb | 06/03 11:30 | 25 | Henrique Rocha vs Nicolas Alvarez Varona | View |
| Challenger - Vicenza | 05/26 08:00 | 14 | Nicolas Alvarez Varona v Hazem Naw | 3-6,2-6 | |
| Challenger Skopje | 05/22 11:05 | 26 | Nicolas Alvarez Varona v Alexander Weis | 6-4,4-6,2-6 | |
| Challenger Skopje | 05/20 13:35 | 25 | Chun Hsin Tseng v Nicolas Alvarez Varona | 2-6,4-6 | |
| ITF - M25 Sabadell | 05/01 09:30 | 25 | Nicolas Alvarez Varona v Nino Serdarusic | Retired | |
| ATP - Barcelona | 04/13 11:55 | 45 | Nicolas Alvarez Varona v Hugo Grenier | 6-7,2-6 | |
| Challenger - Girona | 03/26 13:00 | 25 | Marco Trungelliti v Nicolas Alvarez Varona | 7-5,1-6,7-5 | |
| Challenger - Girona | 03/24 11:40 | 14 | Joao Sousa v Nicolas Alvarez Varona | CANC | |
| Challenger - Murcia | 03/21 14:50 | 26 | Bu Yunchaokete v Nicolas Alvarez Varona | 7-6,6-3 | |
| Challenger - Murcia | 03/19 14:20 | 25 | Nicolas Alvarez Varona v Stefano Napolitano | 6-0,2-6,6-4 | |
| Challenger - Murcia | 03/18 10:00 | 19 | Raul Brancaccio v Nicolas Alvarez Varona | 4-6,3-6 | |
| Challenger - Murcia | 03/17 12:05 | 14 | Nicolas Alvarez Varona v Carlos Lopez Montagud | 6-4,5-7,6-4 | |
| ITF - M15 Antalya | 03/05 08:20 | 62 | Nicolas Alvarez Varona v Dinko Dinev | 6-7,4-6 |
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.