| Singles | |
|---|---|
| 2023 Antalya Challenger | |
| Champion |  Fábián Marozsán |
| Runner-up |  Sebastian Ofner |
| Score | 7–5, 6–0 |
Evgenii Tiurnev was the defending champion [1] but chose not to defend his title.
Fábián Marozsán won the title after defeating Sebastian Ofner 7–5, 6–0 in the final.
Sebastian Ofner (final) Fábián Marozsán (champion)
Flavio Cobolli (second round)
Vít Kopřiva (semifinals) Zdeněk Kolář (second round)
Damir Džumhur (second round)
Li Tu (first round)
Nicholas David Ionel (second round)| Semifinals | Final | ||||||||||||
| 1 | Sebastian Ofner | 78 | 77 | ||||||||||
| Gianluca Mager | 66 | 64 | |||||||||||
| 1 | Sebastian Ofner | 5 | 0 | ||||||||||
| 2 | Fábián Marozsán | 7 | 6 | ||||||||||
| 4 | Vít Kopřiva | 3 | 2 | ||||||||||
| 2 | Fábián Marozsán | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | S Ofner | 7 | 6 | ||||||||||||||||||||||||
| WC |  Y Erel | 5 | 2 | 1 | S Ofner | 4 | 7 | 77 | |||||||||||||||||||
| WC | E Kırkın | 3 | 2 | M Valkusz | 6 | 5 | 65 | ||||||||||||||||||||
| M Valkusz | 6 | 6 | 1 | S Ofner | 6 | 6 | |||||||||||||||||||||
 K Coppejans | 6 | 6 | K Coppejans | 4 | 1 | ||||||||||||||||||||||
 N Serdarušić | 4 | 2 | K Coppejans | 3 | 6 | 77 | |||||||||||||||||||||
| Q |  Mathys Erhard | 1 | 3 | 5 | Z Kolář | 6 | 3 | 63 | |||||||||||||||||||
| 5 | Z Kolář | 6 | 6 | 1 | S Ofner | 78 | 77 | ||||||||||||||||||||
| 3 | F Cobolli | 3 | 6 | 77 | G Mager | 66 | 64 | ||||||||||||||||||||
| Q | M Bašić | 6 | 2 | 64 | 3 | F Cobolli | 0 | 3 | |||||||||||||||||||
| LL | L Neumayer | 2 | 3 | G Mager | 6 | 6 | |||||||||||||||||||||
| G Mager | 6 | 6 | G Mager | 6 | 1 | ||||||||||||||||||||||
 I Gakhov | 5 | 3 | N Fatić | 4 | 0r | ||||||||||||||||||||||
| N Fatić | 7 | 6 | N Fatić | 6 | 3 | 6 | |||||||||||||||||||||
| Q | G Ferrari | 2 | 3 | 6 | D Džumhur | 4 | 6 | 4 | |||||||||||||||||||
| 6 | D Džumhur | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | L Tu | 77 | 0 | 2 | |||||||||||||||||||||||
| M Geerts | 60 | 6 | 6 | M Geerts | 6 | 6 | |||||||||||||||||||||
| Q | S Caruso | 68 | 6 | 6 | Q | S Caruso | 4 | 4 | |||||||||||||||||||
 N Sánchez Izquierdo | 710 | 4 | 2 | M Geerts | 77 | 5 | 1 | ||||||||||||||||||||
| WC |  V Gaubas | 5 | 3 | 4 | V Kopřiva | 62 | 7 | 6 | |||||||||||||||||||
 S Diez | 7 | 6 | S Diez | 2 | 0 | ||||||||||||||||||||||
| Q | S Travaglia | 77 | 3 | 4 | 4 | V Kopřiva | 6 | 6 | |||||||||||||||||||
| 4 | V Kopřiva | 64 | 6 | 6 | 4 | V Kopřiva | 3 | 2 | |||||||||||||||||||
| 8 | ND Ionel | 77 | 6 | 2 | F Marozsán | 6 | 6 | ||||||||||||||||||||
| O Roca Batalla | 63 | 0 | 8 | ND Ionel | 0 | 3 | |||||||||||||||||||||
 D Michalski | 4 | 6 | 6 | D Michalski | 6 | 6 | |||||||||||||||||||||
 J Domingues | 6 | 0 | 0 | D Michalski | 6 | 1 | 2 | ||||||||||||||||||||
| A Giannessi | 77 | 6 | 2 | F Marozsán | 1 | 6 | 6 | ||||||||||||||||||||
 Lucas Gerch | 64 | 1 | A Giannessi | 65 | 2 | ||||||||||||||||||||||
 M Zekić | 1 | 5 | 2 | F Marozsán | 77 | 6 | |||||||||||||||||||||
| 2 | F Marozsán | 6 | 7 | ||||||||||||||||||||||||
Richard Gasquet was the defending champion but withdrew before the tournament began.
Dominic Thiem was the defending champion, but lost in the quarterfinals to Fernando Verdasco.
Pablo Cuevas was the three-time defending champion, but lost in the semifinals to Fabio Fognini.
Egor Gerasimov was the defending champion but lost in the second round to Jurij Rodionov.
Sebastian Ofner was the defending champion but lost in the third round to Aleksandar Vukic.
Ugo Humbert was the defending champion but chose not to defend his title.
Zizou Bergs was the defending champion but lost in the second round to Kacper Żuk.
Andrej Martin and Hans Podlipnik Castillo were the defending champions but chose not to defend their title.
Matteo Berrettini defeated Cameron Norrie in the final, 6–4, 6–7(5–7), 6–3, to win the singles tennis title at the 2021 Queen's Club Championships. Berrettini's win earned him his fourth career ATP Tour singles title, his first ATP 500 victory, and also made him the first player to win the tournament on their main draw debut since Boris Becker in 1985. Norrie was contesting for his first title in his fourth career final.
Kevin Anderson defeated Jenson Brooksby in the final, 7–6(10–8), 6–4, to win the singles tennis title at the 2021 Hall of Fame Open. It was played on outdoor grass courts and was part of the 250 series of the 2021 ATP Tour. It took place at the International Tennis Hall of Fame in Newport, Rhode Island, United States from 12 to 18 July 2021.
Tomasz Bednarek and Nikola Mektić were the defending champions but chose not to defend their title.
Aslan Karatsev was the defending champion but chose not to defend his title.
Sebastian Ofner was the defending champion but chose not to defend his title.
Nuno Borges was the defending champion but chose not to defend his title.
Marco Bortolotti and Cristian Rodríguez were the defending champions but chose not to defend their 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.
Tallon Griekspoor was the defending champion but chose not to defend his title.
Stuart Parker was the defending champion but lost in the qualifying competition to Giovanni Fonio.
Casper Ruud defeated Miomir Kecmanović in the final, 6–2, 7–6(7–3) to win the singles tennis title at the 2023 Estoril Open. The victory marked Ruud's tenth career singles title and his first of the season. Kecmanović was bidding to secure his second career singles title.