2021 Ambato La Gran Ciudad
Date	20–26 September
Edition	1st
Surface	Clay
Location	Ambato, Ecuador
Champions
Singles
Thiago Agustín Tirante
Doubles
Diego Hidalgo / Cristian Rodríguez
Ambato La Gran Ciudad · 2022 →

The 2021 Ambato La Gran Ciudad was a professional tennis tournament played on clay courts. It was the 1st edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Ambato, Ecuador between 20 and 26 September 2021.

Singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
PER	Juan Pablo Varillas	122	1
SVK	Andrej Martin	123	2
BOL	Hugo Dellien	144	3
ECU	Emilio Gómez	156	4
ARG	Renzo Olivo	207	5
ARG	Juan Pablo Ficovich	247	6
ARG	Thiago Agustín Tirante	267	7
BIH	Mirza Bašić	269	8

• ¹ Rankings are as of 13 September 2021.^[1]

Other entrants

The following players received wildcards into the singles main draw:

• Daniel Espín Pérez
• Diego Hidalgo
• Antonio Cayetano March

The following player received entry into the singles main draw using a protected ranking:

• Gerald Melzer

The following player received entry into the singles main draw as a special exempt:

• Gonzalo Lama

The following players received entry from the qualifying draw:

• Alejandro Gómez
• Patrick Kypson
• Pol Martín Tiffon
• Matías Zukas

The following players received entry as lucky losers:

• Alexis Gautier
• Alejandro González

Champions

Singles

• Thiago Agustín Tirante def. Juan Pablo Varillas 7–5, 7–5.

Doubles

• Diego Hidalgo / Cristian Rodríguez def. Alejandro Gómez / Thiago Agustín Tirante 6–3, 4–6, [10–3].