| Singles | |
|---|---|
| 2024 San Marino Open | |
| Champion |  Alexandre Müller |
| Runner-up |  Tseng Chun-hsin |
| Score | 6–3, 4–6, 7–6(7–3) |
Jaume Munar was the defending champion [1] but chose not to defend his title.
Alexandre Müller won the title after defeating Tseng Chun-hsin 6–3, 4–6, 7–6(7–3) in the final.
Fabio Fognini (semifinals)
Francisco Comesaña (semifinals) Alexandre Müller (champion)
Albert Ramos Viñolas (first round) Matteo Gigante (quarterfinals)
Gustavo Heide (quarterfinals) Andrea Pellegrino (quarterfinals) Juan Manuel Cerúndolo (quarterfinals)| Semifinals | Final | ||||||||||||
| 1/WC | Fabio Fognini | 2 | 5 | ||||||||||
| 3 | Alexandre Müller | 6 | 7 | ||||||||||
| 3 | Alexandre Müller | 6 | 4 | 77 | |||||||||
| Tseng Chun-hsin | 3 | 6 | 63 | ||||||||||
| Tseng Chun-hsin | 4 | 6 | 6 | ||||||||||
| 2 | Francisco Comesaña | 6 | 1 | 3 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/WC | F Fognini | 65 | 6 | 6 | |||||||||||||||||||||||
| Q | P Sakamoto | 77 | 1 | 2 | 1/WC | F Fognini | 1 | 77 | 6 | ||||||||||||||||||
| Samuel Vincent Ruggeri | 6 | 6 | S Vincent Ruggeri | 6 | 65 | 0 | |||||||||||||||||||||
| Q | JL Reis da Silva | 4 | 1 | 1/WC | F Fognini | 7 | 6 | ||||||||||||||||||||
 V Gaubas | 3 | 2 | 5 | M Gigante | 5 | 2 | |||||||||||||||||||||
| K Jacquet | 6 | 6 | K Jacquet | 3 | 3 | ||||||||||||||||||||||
| WC | Andrea Picchione | 1 | 65 | 5 | M Gigante | 6 | 6 | ||||||||||||||||||||
| 5 | M Gigante | 6 | 77 | 1/WC | F Fognini | 2 | 5 | ||||||||||||||||||||
| 3 | A Müller | 6 | 77 | 3 | A Müller | 6 | 7 | ||||||||||||||||||||
| Q |  R Bertola | 1 | 63 | 3 | A Müller | 6 | 6 | ||||||||||||||||||||
| Q | M Alves | 62 | 62 | G Fonio | 3 | 3 | |||||||||||||||||||||
| G Fonio | 77 | 77 | 3 | A Müller | 6 | 6 | |||||||||||||||||||||
| A Collarini | 3 | 6 | 3 | 8 | JM Cerúndolo | 2 | 3 | ||||||||||||||||||||
| WC | M Cecchinato | 6 | 3 | 6 | WC | M Cecchinato | 4 | 62 | |||||||||||||||||||
 G Bueno | 2 | 1 | 8 | JM Cerúndolo | 6 | 77 | |||||||||||||||||||||
| 8 | JM Cerúndolo | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | G Heide | 3 | 6 | 6 | |||||||||||||||||||||||
 F Misolic | 6 | 4 | 1 | 6 | G Heide | 6 | 5 | 77 | |||||||||||||||||||
| LL | G Villanueva | 3 | 5 |  N Fatić | 2 | 7 | 65 | ||||||||||||||||||||
| N Fatić | 6 | 7 | 6 | G Heide | 62 | 2 | |||||||||||||||||||||
| C-h Tseng | 6 | 6 | C-h Tseng | 77 | 6 | ||||||||||||||||||||||
| F Maestrelli | 3 | 3 | C-h Tseng | 6 | 6 | ||||||||||||||||||||||
| Q | Carlos López Montagud | 1 | 6 | 6 | Q | C López Montagud | 4 | 3 | |||||||||||||||||||
| 4 | A Ramos Viñolas | 6 | 2 | 2 | C-h Tseng | 4 | 6 | 6 | |||||||||||||||||||
| 7 | A Pellegrino | 6 | 7 | 2 | F Comesaña | 6 | 1 | 3 | |||||||||||||||||||
| Q |  Kirill Kivattsev | 4 | 5 | 7 | A Pellegrino | 6 | 61 | 6 | |||||||||||||||||||
| B Paire | 2 | 1 | Alt | A Weis | 1 | 77 | 2 | ||||||||||||||||||||
| Alt | Alexander Weis | 6 | 6 | 7 | A Pellegrino | 2 | 2 | ||||||||||||||||||||
 N Hardt | 6 | 6 | 2 | F Comesaña | 6 | 6 | |||||||||||||||||||||
| M Janvier | 1 | 3 | N Hardt | 77 | 4 | 4 | |||||||||||||||||||||
| LL | D Dutra da Silva | 1 | 3 | 2 | F Comesaña | 62 | 6 | 6 | |||||||||||||||||||
| 2 | F Comesaña | 6 | 6 | ||||||||||||||||||||||||
Cristian Garín was the defending champion, having won the event in 2013, but decided not to compete.
Alexander Zverev was the defending champion, but chose not to participate this year.
Pablo Carreño Busta was the defending champion, but lost in the semifinals to Frances Tiafoe.
Jaume Munar was the defending champion but chose not to defend his title.
Lukáš Lacko was the defending champion but chose not to defend his title.
Hubert Hurkacz was the defending champion, but chose not to defend his title.
Diego Schwartzman defeated Francisco Cerúndolo in the final, 6–1, 6–2 to win the men's singles tennis title at the 2021 Argentina Open.
Roberto Carballés Baena and Alejandro Davidovich Fokina were the defending champions, but Davidovich Fokina chose to participate in Marseille instead. Carballés Baena partnered Federico Coria but lost in the first round to Raven Klaasen and Ben McLachlan.
Albert Ramos Viñolas defeated Cameron Norrie in the final, 4–6, 6–3, 7–6(7–3) to win the singles tennis title at the 2021 Estoril Open. It marked his third career ATP Tour singles title, all of which have been on clay. Norrie was aiming to win his first ATP Tour title in his second final.
Mikael Ymer was the defending champion but chose not to defend his title.
Jaume Munar was the defending champion but chose not to defend his title.
Jaume Munar was the defending champion but lost in the semifinals to Juan Ignacio Londero.
Purav Raja and Ramkumar Ramanathan were the defending champions but chose to defend their title with different partners. Raja partnered Jeevan Nedunchezhiyan but lost in the quarterfinals to Jay Clarke and Marc Polmans. Ramanathan partnered Saketh Myneni and successfully defended his title, defeating Hugo Grenier and Alexandre Müller 6–3, 6–2 in the final.
Gianluca Mager was the defending champion but chose not to defend his title.
Jaume Munar was the defending champion but lost in the quarterfinals to Alexandre Müller.
Borna Ćorić was the defending champion but chose not to defend his title.
Pavel Kotov was the defending champion but chose not to defend his title.
Jannik Sinner defeated the defending champion Daniil Medvedev in the final, 7–6(9–7), 4–6, 6–3 to win the singles tennis title at the 2023 Vienna Open. It was his tenth ATP Tour singles title.
Leandro Riedi was the defending champion but lost in the first round to Damir Džumhur.
Alejandro Tabilo defeated Taro Daniel in the final, 6–2, 7–5 to win the men's singles tennis title at the 2024 ASB Classic. It was his first ATP Tour title, and he became the first qualifier to win an ATP Tour title since Juan Manuel Cerúndolo in 2021.