| Singles | |
|---|---|
| 2023 Heilbronner Neckarcup | |
| Champion |  Matteo Arnaldi |
| Runner-up |  Facundo Díaz Acosta |
| Score | 7–6(7–4), 6–1 |
Daniel Altmaier was the defending champion [1] but chose not to defend his title.
Matteo Arnaldi won the title after defeating Facundo Díaz Acosta 7–6(7–4), 6–1 in the final.
Marco Cecchinato (first round)
Jaume Munar (quarterfinals)
Daniel Elahi Galán (quarterfinals)
Dominic Thiem (second round) Matteo Arnaldi (champion)
Fábián Marozsán (second round)
Oscar Otte (first round)
Pavel Kotov (quarterfinals)| Semifinals | Final | ||||||||||||
| Facundo Díaz Acosta | 7 | 6 | |||||||||||
| WC | Rudolf Molleker | 5 | 3 | ||||||||||
| Facundo Díaz Acosta | 64 | 1 | |||||||||||
| 5 | Matteo Arnaldi | 77 | 6 | ||||||||||
| Pedro Martínez | 64 | 5 | |||||||||||
| 5 | Matteo Arnaldi | 77 | 7 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | M Cecchinato | 5 | 3 | ||||||||||||||||||||||||
| Q |  A Santillan | 7 | 6 | Q | A Santillan | 6 | 3 | 6 | |||||||||||||||||||
 J Kovalík | 3 | 6 | 77 | J Kovalík | 2 | 6 | 3 | ||||||||||||||||||||
| M Marterer | 6 | 2 | 65 | Q | A Santillan | 5 | 3 | ||||||||||||||||||||
| LL |  M Janvier | 6 | 6 | F Díaz Acosta | 7 | 6 | |||||||||||||||||||||
| Q | Lucas Gerch | 4 | 3 | LL | M Janvier | 1 | 6 | 65 | |||||||||||||||||||
| F Díaz Acosta | 6 | 61 | 6 | F Díaz Acosta | 6 | 3 | 77 | ||||||||||||||||||||
| 7 | O Otte | 4 | 77 | 1 | F Díaz Acosta | 7 | 6 | ||||||||||||||||||||
| 3 | DE Galán | 6 | 77 | WC | R Molleker | 5 | 3 | ||||||||||||||||||||
| Alt |  C İlkel | 4 | 63 | 3 | DE Galán | 5 | 6 | 6 | |||||||||||||||||||
| Q |  J Kym | 62 | 3 |  F Meligeni Alves | 7 | 0 | 2 | ||||||||||||||||||||
| F Meligeni Alves | 77 | 6 | 3 | DE Galán | 4 | 7 | 5 | ||||||||||||||||||||
| Q | Sebastian Fanselow | 4 | 77 | 1 | WC | R Molleker | 6 | 5 | 7 | ||||||||||||||||||
| WC | R Molleker | 6 | 65 | 6 | WC | R Molleker | 7 | 6 | |||||||||||||||||||
| Alt | H Casanova | 3 | 4 | 6 | F Marozsán | 5 | 4 | ||||||||||||||||||||
| 6 | F Marozsán | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | P Kotov | 78 | 6 | ||||||||||||||||||||||||
| A Pellegrino | 66 | 2 | 8 | P Kotov | 6 | 6 | |||||||||||||||||||||
| Q | MH Rehberg | 2 | 4r | Alt | D Added | 2 | 2 | ||||||||||||||||||||
| Alt | D Added | 6 | 5 | 8 | P Kotov | 4 | 6 | 63 | |||||||||||||||||||
| Q | H Squire | 4 | 2 | P Martínez | 6 | 4 | 77 | ||||||||||||||||||||
| P Martínez | 6 | 6 | P Martínez | 2 | 6 | 6 | |||||||||||||||||||||
 K Uchida | 4 | 4 | 4/WC | D Thiem | 6 | 3 | 1 | ||||||||||||||||||||
| 4/WC | D Thiem | 6 | 6 | P Martínez | 64 | 5 | |||||||||||||||||||||
| 5 | M Arnaldi | 7 | 6 | 5 | M Arnaldi | 77 | 7 | ||||||||||||||||||||
| N Gombos | 5 | 3 | 5 | M Arnaldi | 2 | 6 | 6 | ||||||||||||||||||||
 O Krutykh | 4 | 4 | WC | M Topo | 6 | 3 | 1 | ||||||||||||||||||||
| WC | M Topo | 6 | 6 | 5 | M Arnaldi | 1 | 6 | 7 | |||||||||||||||||||
 D Džumhur | 5 | 1 | 2 | J Munar | 6 | 4 | 5 | ||||||||||||||||||||
 T Skatov | 7 | 6 | T Skatov | 2 | 5 | ||||||||||||||||||||||
 H Dellien | 1 | 1 | 2 | J Munar | 6 | 7 | |||||||||||||||||||||
| 2 | J Munar | 6 | 6 | ||||||||||||||||||||||||
Stan Wawrinka was the defending champion and successfully defended his title, defeating Mischa Zverev in the final, 4–6, 6–3, 6–3.
Alexander Zverev was the defending champion from when the event was held in 2019, but chose not to defend his title.
Daniel Elahi Galán was the defending champion but chose not to defend his title.
Sebastian Ofner was the defending champion but chose not to defend his title.
Aslan Karatsev defeated Andy Murray in the final, 6–3, 6–3 to win the men's singles title at the 2022 Sydney Tennis Classic. This was Murray's first ATP final since he won the 2019 European Open.
Denis Kudla defeated Daniel Altmaier in the final, 2–6, 6–2, 6–3, to win the singles tennis title at the 2022 Arizona Tennis Classic. It marked Kudla's eighth career ATP Challenger title.
Bernabé Zapata Miralles was the defending champion but lost in the quarterfinals to Andrej Martin.
Defending champions Nikola Mektić and Mate Pavić defeated John Isner and Diego Schwartzman in the final, 6–2, 6–7(6–8), [12–10] to win the men's doubles tennis title at the 2022 Italian Open. The pair saved a championship point en route to their tenth career title as a team.
Stefano Travaglia was the defending champion but chose not to defend his title.
Daniel Altmaier was the defending champion but chose not to defend his title.
Juan Manuel Cerúndolo was the defending champion but chose not to defend his title.
Constant Lestienne was the defending champion but chose not to defend his title.
Benjamin Bonzi was the defending champion but chose not to defend his title.
Brandon Nakashima was the defending champion but chose not to defend his title.
Alexander Shevchenko was the defending champion but withdrew before his first round match.
Matteo Arnaldi was the defending champion but chose not to defend his title.
Daniil Medvedev defeated Jannik Sinner in the final, 7–5, 6–3 to win the men's singles tennis title at the 2023 Miami Open. It was his fifth ATP Tour Masters 1000 title, fourth title of 2023, and 19th career title overall. He became only the eighth man to win 5 or more ATP Masters Titles.
Defending champion Carlos Alcaraz defeated Jan-Lennard Struff in the final, 6–4, 3–6, 6–3 to win the men's singles tennis title at the 2023 Madrid Open. It was his fourth Masters 1000 title. Struff was the first lucky loser to reach a Masters final.
Matteo Arnaldi was the defending champion but chose not to defend his title.
Daniil Medvedev defeated Holger Rune in the final, 7–5, 7–5 to win the men's singles tennis title at the 2023 Italian Open. It was his fifth title of 2023, sixth career Masters 1000 title, and first ATP Tour title on clay. Before 2023, Medvedev had never won a match at the Italian Open in three previous appearances.