Results
| Challenger Genoa | 09/03 13:30 | 26 | Alvaro Guillen Meza v Andrea Picchione | Walkover | |
| Challenger Genoa | 09/02 08:00 | 25 | [243] Alvaro Guillen Meza v Giovanni Fonio [407] | 6-3,3-6,6-4 | |
| Challenger Como | 08/29 10:50 | 26 | [377] Ana Bianca Mihaila v Alvaro Guillen Meza [243] | 6-2,6-3 | |
| Challenger Como | 08/26 14:00 | 25 |
[369] Federico Arnaboldi
v
Alvaro Guillen Meza [243] |
4-6,2-6 | |
| Challenger Sofia | 08/20 09:30 | 26 | [276] Marat Sharipov v Alvaro Guillen Meza [248] | 7-6,5-7,6-4 | |
| Challenger Sofia | 08/19 07:00 | 25 |
[270] Murkel Dellien
v
Alvaro Guillen Meza [248] |
3-6,4-6 | |
| ATP Umag | 07/21 19:00 | 25 |
[244] Alvaro Guillen Meza v
Stan Wawrinka
[156] 
|
4-6,1-6 | |
| ATP Umag | 07/20 17:00 | 19 |
[354] Luka Mikrut
v
Alvaro Guillen Meza [223] |
3-6,1-6 | |
| ATP Umag | 07/19 16:35 | 14 |
[223] Alvaro Guillen Meza v
Ugo Blanchet
[173] 
|
6-4,3-6,6-2 | |
| Challenger San Marino | 07/14 14:50 | 25 |
[157] Dino Prizmic
v
Alvaro Guillen Meza [223] |
7-5,6-1 | |
| Challenger Iasi | 07/08 18:50 | 25 |
[500] Michael Vrbensky
v
Alvaro Guillen Meza [233] |
Retired | |
| Challenger Brasov | 07/02 08:00 | 26 | [372] Gabi Adrian Boitan v Alvaro Guillen Meza [233] | 6-2,6-1 |
Wikipedia - Álvaro Guillén Meza
Álvaro Guillén Meza (born 2 January 2003) is an Ecuadorian tennis player. He has a career high ATP singles ranking of world No. 175 achieved on 9 June 2025 and a doubles ranking of No. 400 achieved on 22 July 2024. He is currently the No. 1 Ecuadorian tennis player.
Guillén Meza represents Ecuador at the Davis Cup, where he has a W/L record of 1–1.
History
2023: Maiden Challenger title
At 20 years old, Guillén Meza won his maiden Challenger title at the 2023 Lima Challenger. He became the youngest Ecuadorian champion since Giovanni Lapentti in 2003.
2024: Second Challenger title
Guillén Meza won his second Challenger title at the 2024 Ibagué Open, defeating Facundo Mena in the final.
2025: ATP Tour debut
In May, Guillén Meza claimed his third Challenger title at the 2025 Santos Brasil Tennis Cup, overcoming Matheus Pucinelli de Almeida in the final. As a result he reached the top 200 at world No. 180 on 19 May 2025.
In July, Guillén Meza made his ATP Tour debut as a qualifier at the Croatia Open. He lost to Stan Wawrinka in the first round.