Álvaro Guillén Meza (born 2 January 2003) is an Ecuadorian tennis player. He has a career high ATP singles ranking of world No. 215 achieved on 12 August 2024 and a doubles ranking of No. 400 achieved on 22 July 2024.^[1] He is currently the No. 2 Ecuadorian tennis player.^[2]

Guillén Meza represents Ecuador at the Davis Cup, where he has a W/L record of 1–1.^[3][4]

At 20 years old, Guillén Meza became the youngest Ecuadorian champion since Giovanni Lapentti in 2003 after winning the 2023 Lima Challenger.^[5] He won his second Challenger title at the 2024 Ibagué Open, defeating Facundo Mena in the final.^[6]

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Aug 2023	Lima, Peru	Challenger	Clay	Blaise Bicknell	7–6(7–3), 6–1
Loss	1–1	Jun 2024	Santa Cruz de la Sierra II, Bolivia	Challenger	Clay	Juan Manuel Cerúndolo	6–3, 1–6, 4–6
Win	2–1	Jun 2024	Ibagué, Colombia	Challenger	Clay	Facundo Mena	6–0, 6–4

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Jul 2023	Salinas, Ecuador	Challenger	Hard	Ángel Díaz Jalil	Vasil Kirkov Alfredo Perez	5–7, 5–7
Loss	0–2	Mar 2024	Asunción, Paraguay	Challenger	Clay	Gonzalo Bueno	Boris Arias Federico Zeballos	2–6, 2–6

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Jun 2023	M15 Litija, Slovenia	WTT	Clay	Paweł Ciaś	3–6, 1–6
Win	1–1	Jun 2023	M15 Štore, Slovenia	WTT	Clay	Dominik Kellovský	6–4, 6–0
Win	2–1	Aug 2023	M15 Arequipa, Peru	WTT	Clay	Guido Iván Justo	6–4, 6–3
Loss	2–2	Sep 2023	M15 Punta del Este, Uruguay	WTT	Clay	Bruno Kuzuhara	7–6(7–3), 1–6, 3–6
Win	3–2	Oct 2023	M25 Luján, Argentina	WTT	Clay	Luciano Emanuel Ambrogi	3–6, 6–3, 7–6(7–3)
Loss	3–3	Feb 2024	M25 Punta del Este, Uruguay	WTT	Clay	Murkel Dellien	1–6, 0–6

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Oct 2021	M25 Guayaquil, Ecuador	WTT	Clay	Ángel Díaz Jalil	Facundo Juárez Luis Patiño	3–6, 4–6
Loss	0–2	Jul 2022	M15 Aprilia, Italy	WTT	Clay	Gonzalo Bueno	Franco Emanuel Egea Gabriel Alejandro Hidalgo	2–6, 3–6
Win	1–2	Jul 2022	M15 Gubbio, Italy	WTT	Clay	Gonzalo Bueno	Francesco Forti Gabriele Piraino	walkover
Loss	1–3	Mar 2023	M15 Naples, USA	WTT	Clay	Gonzalo Bueno	Ignacio Monzón Federico Agustín Gómez	3–6, 2–6

• Álvaro Guillén Meza at the Association of Tennis Professionals
• Álvaro Guillén Meza at the International Tennis Federation
• Álvaro Guillén Meza at the Davis Cup