| Singles | |
|---|---|
| 2024 Challenger AAT II | |
| Champion |  Facundo Bagnis |
| Runner-up | Mariano Navone |
| Score | 7–5, 1–6, 7–5 |
Gonzalo Bueno was the defending champion [1] but lost in the first round to Mariano Navone.
Facundo Bagnis won the title after defeating Navone 7–5, 1–6, 7–5 in the final.
Mariano Navone (final) Genaro Alberto Olivieri (first round) Santiago Rodríguez Taverna (quarterfinals) Andrea Collarini (quarterfinals)
Jozef Kovalík (second round, retired)
Lukas Neumayer (first round)
Edoardo Lavagno (semifinals) Facundo Bagnis (champion)| Semifinals | Final | ||||||||||||
| 1/WC | Mariano Navone | 6 | 6 | ||||||||||
| 7 | Edoardo Lavagno | 0 | 4 | ||||||||||
| 1/WC | Mariano Navone | 5 | 6 | 5 | |||||||||
| 8 | Facundo Bagnis | 7 | 1 | 7 | |||||||||
| SE |  Dmitry Popko | 4 | 5 | ||||||||||
| 8 | Facundo Bagnis | 6 | 7 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/WC | M Navone | 6 | 6 | ||||||||||||||||||||||||
| SE |  G Bueno | 3 | 2 | 1/WC | M Navone | 6 | 6 | ||||||||||||||||||||
| Q | G Villanueva | 65 | 4 | Q |  D Wenger | 3 | 3 | ||||||||||||||||||||
| Q | D Wenger | 77 | 6 | 1/WC | M Navone | 6 | 6 | ||||||||||||||||||||
| Alt | G Mager | 5 | 2 |  M Dellien | 2 | 1 | |||||||||||||||||||||
| WC | N Kicker | 7 | 6 | WC | N Kicker | 2 | 3 | ||||||||||||||||||||
| M Dellien | 1 | 7 | 6 | M Dellien | 6 | 6 | |||||||||||||||||||||
| 6 | L Neumayer | 6 | 5 | 3 | 1/WC | M Navone | 6 | 6 | |||||||||||||||||||
| 3 | S Rodríguez Taverna | 65 | 6 | 6 | 7 | E Lavagno | 0 | 4 | |||||||||||||||||||
 G Heide | 77 | 4 | 4 | 3 | S Rodríguez Taverna | 3 | 6 | 6 | |||||||||||||||||||
| Q |  F Gill | 6 | 6 | Q | F Gill | 6 | 4 | 4 | |||||||||||||||||||
 Á Guillén Meza | 2 | 2 | 3 | S Rodríguez Taverna | 6 | 3 | 2 | ||||||||||||||||||||
 O Krutykh | 3 | 3 | 7 | E Lavagno | 4 | 6 | 6 | ||||||||||||||||||||
| Alexander Weis | 6 | 6 | A Weis | 4 | 7 | 5 | |||||||||||||||||||||
| J Fonseca | 5 | 4 | 7 | E Lavagno | 6 | 5 | 7 | ||||||||||||||||||||
| 7 | Edoardo Lavagno | 7 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | J Kovalík | 6 | 3 | 6 | |||||||||||||||||||||||
| WC | JB Torres | 2 | 6 | 2 | 5 | J Kovalík | 3 | 2r | |||||||||||||||||||
| SE | D Popko | 6 | 79 | SE | D Popko | 6 | 5 | ||||||||||||||||||||
| Q |  C Sánchez Jover | 3 | 67 | SE | D Popko | 6 | 6 | ||||||||||||||||||||
| Q | O Luz | 3 | 6 | 1 | 4 | A Collarini | 4 | 4 | |||||||||||||||||||
| N Sánchez Izquierdo | 6 | 2 | 6 | N Sánchez Izquierdo | 6 | 2 | 3 | ||||||||||||||||||||
| Q | H Casanova | 0 | 4 | 4 | A Collarini | 3 | 6 | 6 | |||||||||||||||||||
| 4 | A Collarini | 6 | 6 | SE | D Popko | 4 | 5 | ||||||||||||||||||||
| 8 | F Bagnis | 6 | 6 | 8 | F Bagnis | 6 | 7 | ||||||||||||||||||||
| Alt |  Timo Stodder | 2 | 3 | 8 | F Bagnis | 64 | 6 | 6 | |||||||||||||||||||
| JP Ficovich | 4 | 3 | R Olivo | 77 | 4 | 3 | |||||||||||||||||||||
| R Olivo | 6 | 6 | 8 | F Bagnis | 6 | 6 | |||||||||||||||||||||
 L Draxl | 65 | 6 | 6 | L Draxl | 4 | 4 | |||||||||||||||||||||
| JL Reis da Silva | 77 | 3 | 1 | L Draxl | 6 | 6 | |||||||||||||||||||||
 T Boyer | 6 | 6 | T Boyer | 4 | 4 | ||||||||||||||||||||||
| 2 | GA Olivieri | 0 | 1 | ||||||||||||||||||||||||
Thomaz Bellucci was the defending champion, but lost to Fabio Fognini in the quarterfinals.
Tommy Robredo won the title, defeating Santiago Giraldo 6–2, 2–6, 7–6(7–5), in the final.
Facundo Bagnis was the defending champion, but lost in the semifinals to Marco Trungelliti.
Austin Krajicek won his maiden ATP Challenger Tour singles title, beating João Souza 7–5, 6–3
Federico Delbonis was the defending champion, but lost to Facundo Bagnis in the first round.
Pablo Cuevas won the title, defeating Luca Vanni in the final, 6–4, 3–6, 7–6(7–4).
David Ferrer was the three-time defending champion, but he chose to compete in Acapulco instead.
Rafael Nadal won the title, defeating Juan Mónaco in the final, 6–4, 6–1.
Dominic Thiem defeated Nicolás Almagro in the final, 7–6(7–2), 3–6, 7–6(7–4). He saved a match point en route to the title, in the semifinals against defending champion Rafael Nadal.
David Ferrer was the defending champion, but lost in the quarterfinals to Dominic Thiem.
Facundo Argüello was the defending champion but chose not to defend his title.
Juan Sebastián Cabal and Robert Farah were the defending champions, but lost in the final to Pablo Carreño Busta and Pablo Cuevas, 4–6, 7–5, [8–10].
Fabio Fognini was the defending champion, but chose not to defend his title.
The men's singles tennis event of the 2019 Pan American Games was held July 29 – August 4 at the Club Lawn Tennis de la Exposición in Lima, Peru.
Guido Andreozzi and Guillermo Durán were the defending champions but chose not to defend their title.
Pedro Martínez defeated Sebastián Báez in the final, 4–6, 6–4, 6–4 to win the singles title at the 2022 Chile Open. It was his first ATP Tour title.
Máximo González was the defending champion when the event was last held in 2015, but he chose not to defend his title.
This was the first edition of the tournament.
Arthur Rinderknech was the defending champion but chose not to defend his title.
Juan Manuel Cerúndolo was the defending champion but lost in the quarterfinals to Luciano Darderi.
Álvaro Guillén Meza was the defending champion but lost in the second round to Mariano Navone.
The 2024 Challenger AAT II was a professional tennis tournament played on clay courts. It was the fourth edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Buenos Aires, Argentina between 15 and 21 January 2024.
Federico Coria was the defending champion but chose not to defend his title.