| Singles | |
|---|---|
| 2024 Chennai Open Challenger | |
| Champion |  Sumit Nagal |
| Runner-up |  Luca Nardi |
| Score | 6–1, 6–4 |
Max Purcell was the defending champion [1] but chose not to defend his title.
Sumit Nagal won the title after defeating Luca Nardi 6–1, 6–4 in the final.
Luca Nardi (final) Sumit Nagal (champion)
Dalibor Svrčina (semifinals)
Ugo Blanchet (second round) Stefano Napolitano (quarterfinals)
Oriol Roca Batalla (second round)
Aziz Dougaz (first round)
Hsu Yu-hsiou (first round)| Semifinals | Final | ||||||||||||
| 1 | Luca Nardi | 6 | 4 | 78 | |||||||||
| Tseng Chun-hsin | 4 | 6 | 66 | ||||||||||
| 1 | Luca Nardi | 1 | 4 | ||||||||||
| 2 | Sumit Nagal | 6 | 6 | ||||||||||
| 3 | Dalibor Svrčina | 3 | 4 | ||||||||||
| 2 | Sumit Nagal | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | L Nardi | 6 | 6 | ||||||||||||||||||||||||
| Q |  Eric Vanshelboim | 2 | 2 | 1 | L Nardi | 7 | 6 | ||||||||||||||||||||
| Q |  Olaf Pieczkowski | 6 | 4 | 62 |  B Tomic | 5 | 3 | ||||||||||||||||||||
| B Tomic | 2 | 6 | 77 | 1 | L Nardi | 6 | 3 | 6 | |||||||||||||||||||
| Alt | A Santillan | 6 | 4 | 1r | 5 | S Napolitano | 4 | 6 | 0 | ||||||||||||||||||
| D Added | 2 | 6 | 4 | D Added | 2 | 1 | |||||||||||||||||||||
 K Uchida | 1 | 2 | 5 | S Napolitano | 6 | 6 | |||||||||||||||||||||
| 5 | S Napolitano | 6 | 6 | 1 | L Nardi | 6 | 4 | 78 | |||||||||||||||||||
| 4 | U Blanchet | 6 | 3 | 77 | C-h Tseng | 4 | 6 | 66 | |||||||||||||||||||
| Q | J Forejtek | 3 | 6 | 65 | 4 | U Blanchet | 0 | 6 | 2 | ||||||||||||||||||
| WC |  N Basilashvili | 4 | 4 | C-h Tseng | 6 | 4 | 6 | ||||||||||||||||||||
| C-h Tseng | 6 | 6 | C-h Tseng | 7 | 6 | ||||||||||||||||||||||
| Q |  Alexey Zakharov | 6 | 62 | 4 | E Dalla Valle | 5 | 2 | ||||||||||||||||||||
| Enrico Dalla Valle | 3 | 77 | 6 | E Dalla Valle | 6 | 77 | |||||||||||||||||||||
| WC | R Ramanathan | 63 | 2 | 6 | O Roca Batalla | 4 | 62 | ||||||||||||||||||||
| 6 | O Roca Batalla | 77 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | Y-h Hsu | 77 | 2 | 5 | |||||||||||||||||||||||
| M Echargui | 65 | 6 | 7 | M Echargui | 64 | 3 | |||||||||||||||||||||
| M Kaśnikowski | 3 | 6 | 5 | WC | M Sasikumar | 77 | 6 | ||||||||||||||||||||
| WC | M Sasikumar | 6 | 4 | 7 | WC | M Sasikumar | 78 | 2 | 4 | ||||||||||||||||||
| T-l Wu | 2r | 3 | D Svrčina | 66 | 6 | 6 | |||||||||||||||||||||
| E Donskoy | 3 | E Donskoy | 2 | 6 | 2 | ||||||||||||||||||||||
| Q | B Bobrov | 3 | 6 | 2 | 3 | D Svrčina | 6 | 0 | 6 | ||||||||||||||||||
| 3 | D Svrčina | 6 | 2 | 6 | 3 | D Svrčina | 3 | 4 | |||||||||||||||||||
| 7 | A Dougaz | 3 | 3 | 2 | S Nagal | 6 | 6 | ||||||||||||||||||||
| Alt | Samuel Vincent Ruggeri | 6 | 6 | Alt | S Vincent Ruggeri | 2 | 6 | 4 | |||||||||||||||||||
| Dominik Palán | 6 | 6 | D Palán | 6 | 2 | 6 | |||||||||||||||||||||
| Alt | A Weber | 1 | 4 | D Palán | 3 | 3 | |||||||||||||||||||||
| M Janvier | 4 | 6 | 5 | 2 | S Nagal | 6 | 6 | ||||||||||||||||||||
| G Fonio | 6 | 3 | 7 | G Fonio | 5 | 2 | |||||||||||||||||||||
| Q | SDP Dev | 1 | 2 | 2 | S Nagal | 7 | 6 | ||||||||||||||||||||
| 2 | S Nagal | 6 | 6 | ||||||||||||||||||||||||
Jay Andrijic and Bradley Mousley were the defending champions, but Andrijic was no longer eligible to participate.
Mousley successfully defended the title with Lucas Miedler, defeating Quentin Halys and Johan-Sébastien Tatlot in the final, 6–4, 6–3.
Orlando Luz and Marcelo Zormann were the defending champions, but they chose to participate at the Pan American Games instead.
Lý Hoàng Nam and Sumit Nagal were the defending champions, but were both ineligible to compete this year.
Stefano Travaglia was the defending champion but chose not to defend his title.
Sumit Nagal was the defending champion but lost in the quarterfinals to Saketh Myneni.
Luca Vanni was the defending champion but chose not to defend his title.
Alessandro Giannessi was the defending champion but chose not to defend his title.
Pablo Andújar was the defending champion but chose not to defend his title.
Cristian Garín 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.
Lorenzo Sonego defeated defending champion Laslo Đere in the final, 2–6, 7–6(7–5), 6–4 to win the men's singles title at the 2021 Sardegna Open. With the victory, Sonego became the first Italian in 15 years to capture an ATP Tour title on home soil.
Oscar Otte was the defending champion but retired in the quarterfinals to Elias Ymer.
Andrey Rublev was the defending champion, but chose to not defend his title as he and other Russian Olympic athletes were sent to Yuzhno-Sakhalinsk for training sessions.
Pedro Sousa was the defending champion but chose not to defend his title.
Tallon Griekspoor was the defending champion but chose not to defend his title.
Corentin Moutet was the defending champion but chose not to defend his title.
Aleksandar Vukic was the defending champion but chose not to defend his title.
James Duckworth was the defending champion but lost in the second round to Miljan Zekić.
Zsombor Piros was the defending champion but lost in the second round to Henri Squire.
Max Purcell was the defending champion but chose not to defend his title.