| Singles | |
|---|---|
| 2024 Heilbronner Neckarcup | |
| Champion |  Sumit Nagal |
| Runner-up |  Alexander Ritschard |
| Score | 6–1, 6–7(5–7), 6–3 |
Matteo Arnaldi was the defending champion [1] but chose not to defend his title.
Sumit Nagal won the title after defeating Alexander Ritschard 6–1, 6–7(5–7), 6–3 in the final. [2]
Daniel Altmaier (second round) Yannick Hanfmann (first round) Sumit Nagal (champion) Maximilian Marterer (second round)
Luca Van Assche (semifinals)
Daniel Elahi Galán (first round)
Albert Ramos Viñolas (first round)
Jurij Rodionov (second round)| Semifinals | Final | ||||||||||||
| 5 | Luca Van Assche | 2 | 65 | ||||||||||
| 3 | Sumit Nagal | 6 | 77 | ||||||||||
| 3 | Sumit Nagal | 6 | 65 | 6 | |||||||||
| Alexander Ritschard | 1 | 77 | 3 | ||||||||||
| Alexander Ritschard | 6 | 67 | 6 | ||||||||||
 Jan Choinski | 3 | 79 | 4 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/WC | D Altmaier | 6 | 77 | ||||||||||||||||||||||||
| WC | M Topo | 3 | 64 | 1/WC | D Altmaier | 2 | 5 | ||||||||||||||||||||
 M Kaśnikowski | 4 | 6 | 6 | M Kaśnikowski | 6 | 7 | |||||||||||||||||||||
| Alt | S Fanselow | 6 | 4 | 1 | M Kaśnikowski | 3 | 6 | 0 | |||||||||||||||||||
| G Blancaneaux | 6 | 79 | 5 | L Van Assche | 6 | 3 | 6 | ||||||||||||||||||||
| Q | Lasse Pörtner | 1 | 67 | G Blancaneaux | 6 | 3 | 2 | ||||||||||||||||||||
| M Janvier | 77 | 3 | 62 | 5 | L Van Assche | 3 | 6 | 6 | |||||||||||||||||||
| 5 | L Van Assche | 62 | 6 | 77 | 5 | L Van Assche | 2 | 65 | |||||||||||||||||||
| 3 | S Nagal | 6 | 1 | 6 | 3 | S Nagal | 6 | 77 | |||||||||||||||||||
| Q |  N Basilashvili | 2 | 6 | 3 | 3 | S Nagal | 6 | 6 | |||||||||||||||||||
| J Barranco Cosano | 6 | 6 | J Barranco Cosano | 4 | 1 | ||||||||||||||||||||||
| Alt |  A Holmgren | 4 | 2 | 3 | S Nagal | 6 | 77 | ||||||||||||||||||||
| N Sánchez Izquierdo | 78 | 6 |  I Gakhov | 1 | 64 | ||||||||||||||||||||||
| Q |  D Dutra da Silva | 66 | 2 | N Sánchez Izquierdo | 3 | 1 | |||||||||||||||||||||
| I Gakhov | 6 | 6 | I Gakhov | 6 | 6 | ||||||||||||||||||||||
| 6 | DE Galán | 4 | 3 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | A Ramos Viñolas | 4 | 62 | ||||||||||||||||||||||||
| A Ritschard | 6 | 77 | A Ritschard | 6 | 6 | ||||||||||||||||||||||
 T Barrios Vera | 6 | 6 | T Barrios Vera | 3 | 3 | ||||||||||||||||||||||
| B Hassan | 4 | 0 | A Ritschard | 6 | 6 | ||||||||||||||||||||||
| H Squire | 6 | 6 | H Squire | 2 | 3 | ||||||||||||||||||||||
 AD Vallejo | 3 | 2 | H Squire | 6 | 6 | ||||||||||||||||||||||
| Q | D Masur | 3 | 0 | 4 | M Marterer | 0 | 2 | ||||||||||||||||||||
| 4 | M Marterer | 6 | 6 | A Ritschard | 6 | 67 | 6 | ||||||||||||||||||||
| 8 | J Rodionov | 6 | 63 | 6 | J Choinski | 3 | 79 | 4 | |||||||||||||||||||
| M Martineau | 3 | 77 | 2 | 8 | J Rodionov | 6 | 64 | 61 | |||||||||||||||||||
| Q | F Gill | 4 | 5 | A Moro Cañas | 3 | 77 | 77 | ||||||||||||||||||||
| A Moro Cañas | 6 | 7 | A Moro Cañas | 3 | 3 | ||||||||||||||||||||||
| Q | Peter Heller | 5 | 6 | 7 | J Choinski | 6 | 6 | ||||||||||||||||||||
| R Molleker | 7 | 4 | 5 | Q | P Heller | 3 | 3 | ||||||||||||||||||||
| J Choinski | 6 | 6 | J Choinski | 6 | 6 | ||||||||||||||||||||||
| 2/WC | Y Hanfmann | 4 | 2 | ||||||||||||||||||||||||
Orlando Luz and Marcelo Zormann were the defending champions, but they chose to participate at the Pan American Games instead.
Laslo Đere 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.
Botic van de Zandschulp was the defending champion but withdrew before his semifinal match against Taro Daniel.
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.
The men's singles of the 2021 I.ČLTK Prague Open tournament was played on clay in Prague, Czech Republic.
Thiago Monteiro was the defending champion but chose not to defend his title.
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.
Facundo Mena was the defending champion but chose not to defend his title.
Marc-Andrea Hüsler was the defending champion but lost in the semifinals to Thanasi Kokkinakis.
Stefano Travaglia was the defending champion but chose not to defend his title.
Zsombor Piros was the defending champion but lost in the second round to Henri Squire.
Dušan Lajović was the defending champion but chose not to defend his title.
Max Purcell was the defending champion but chose not to defend his title.
Stefanos Tsitsipas defeated Casper Ruud in the final, 6–1, 6–4 to win the men's singles tennis title at the 2024 Monte-Carlo Masters. It was his third Monte-Carlo Masters title and eleventh ATP Tour singles title. Tsitsipas became the fifth player in the Open Era to win three titles at the tournament, after Ilie Năstase (3), Björn Borg (3), Thomas Muster (3) and Rafael Nadal (11).
Fábián Marozsán was the defending champion but chose not to defend his title.
Sumit Nagal was the defending champion but chose not to defend his title.