| Singles | |
|---|---|
| 2023 Platzmann-Sauerland Open | |
| Champion |  Duje Ajduković |
| Runner-up |  Hugo Dellien |
| Score | 7–5, 6–4 |
Hamad Medjedovic was the defending champion [1] but chose not to defend his title.
Duje Ajduković won the title after defeating Hugo Dellien 7–5, 6–4 in the final.
Fábián Marozsán (second round)
Pedro Martínez (quarterfinals)
Benoît Paire (semifinals)
Timofey Skatov (second round)
Maximilian Marterer (first round)
Raúl Brancaccio (semifinals, retired)
Jan Choinski (first round) Hugo Dellien (final)| Semifinals | Final | ||||||||||||
| Q | Duje Ajduković | 6 | 2 | ||||||||||
| 6 | Raúl Brancaccio | 3 | 1r | ||||||||||
| Q | Duje Ajduković | 7 | 6 | ||||||||||
| 8 | Hugo Dellien | 5 | 4 | ||||||||||
| 3 | Benoît Paire | 77 | 4 | 3 | |||||||||
| 8 | Hugo Dellien | 64 | 6 | 6 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | F Marozsán | 77 | 6 | ||||||||||||||||||||||||
| WC | Liam Gavrielides | 64 | 3 | 1 | F Marozsán | 6 | 63 | 2 | |||||||||||||||||||
| WC | MH Rehberg | 4 | 2 | R Molleker | 0 | 77 | 6 | ||||||||||||||||||||
| R Molleker | 6 | 6 | R Molleker | 2 | 4 | ||||||||||||||||||||||
| O Roca Batalla | 6 | 6 | Q | D Ajduković | 6 | 6 | |||||||||||||||||||||
| Q | Tommaso Compagnucci | 3 | 4 | O Roca Batalla | 4 | 4 | |||||||||||||||||||||
| Q | D Ajduković | 6 | 1 | 77 | Q | D Ajduković | 6 | 6 | |||||||||||||||||||
| 5 | M Marterer | 3 | 6 | 65 | Q | D Ajduković | 6 | 2 | |||||||||||||||||||
| 4 | T Skatov | 6 | 65 | 7 | 6 | R Brancaccio | 3 | 1r | |||||||||||||||||||
 O Krutykh | 3 | 77 | 5 | 4 | T Skatov | 3 | 7 | 65 | |||||||||||||||||||
| G Blancaneaux | 4 | 1 |  C Ugo Carabelli | 6 | 5 | 77 | |||||||||||||||||||||
| C Ugo Carabelli | 6 | 6 | C Ugo Carabelli | 4 | 6 | 4 | |||||||||||||||||||||
| S Travaglia | 63 | 0r | 6 | R Brancaccio | 6 | 3 | 6 | ||||||||||||||||||||
| Alt | H Squire | 77 | 1 | Alt | H Squire | 3 | 6 | 4 | |||||||||||||||||||
 H Laaksonen | 4 | 6 | 63 | 6 | R Brancaccio | 6 | 2 | 6 | |||||||||||||||||||
| 6 | R Brancaccio | 6 | 3 | 77 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | J Choinski | 4 | 2 | ||||||||||||||||||||||||
 G Onclin | 6 | 6 | G Onclin | 6 | 6 | ||||||||||||||||||||||
| S Rodríguez Taverna | 6 | 6 | S Rodríguez Taverna | 1 | 4 | ||||||||||||||||||||||
| Q | Georgii Kravchenko | 3 | 2 | G Onclin | 4 | 4 | |||||||||||||||||||||
| Q | M Möller | 6 | 6 | 3 | B Paire | 6 | 6 | ||||||||||||||||||||
 N Hardt | 3 | 1 | Q | M Möller | 4 | 4 | |||||||||||||||||||||
| F Mena | 4 | 3 | 3 | B Paire | 6 | 6 | |||||||||||||||||||||
| 3 | B Paire | 6 | 6 | 3 | B Paire | 77 | 4 | 3 | |||||||||||||||||||
| 8 | H Dellien | 6 | 6 | 8 | H Dellien | 64 | 6 | 6 | |||||||||||||||||||
| D Masur | 2 | 3 | 8 | H Dellien | 1 | 6 | 77 | ||||||||||||||||||||
 J Kovalík | 79 | 6 | J Kovalík | 6 | 1 | 63 | |||||||||||||||||||||
| Q |  H Naw | 67 | 3 | 8 | H Dellien | 7 | 7 | ||||||||||||||||||||
| WC | L Wessels | 6 | 79 | 2 | P Martínez | 5 | 5 | ||||||||||||||||||||
| Q |  M Zormann | 3 | 67 | WC | L Wessels | 4 | 2 | ||||||||||||||||||||
| M Navone | 5 | 6 | 62 | 2 | P Martínez | 6 | 6 | ||||||||||||||||||||
| 2 | P Martínez | 7 | 2 | 77 | |||||||||||||||||||||||
Jack Sock was the defending champion, but participated in the men's main draw, as he was ineligible to defend his title.
Tennys Sandgren was the defending champion but chose not to defend his title.
Filip Krajinović was the defending champion but chose not to defend his title.
Dominic Thiem was the defending champion, but lost to Diego Schwartzman in the semifinals.
Tommy Paul won the title after defeating Tennys Sandgren 6–3, 6–4 in the final.
Hugo Dellien was the defending champion but chose not to defend his title.
Nikoloz Basilashvili was the defending champion and successfully defended his title, defeating Andrey Rublev in the final, 7–5, 4–6, 6–3. En route to doing so, Basilashvili saved two match points against Alexander Zverev in the semifinals.
Martin Kližan was the defending champion but lost in the first round to Matthias Bachinger.
Roger Federer was the two-time defending champion and successfully defended his title, defeating Alex de Minaur in the final, 6–2, 6–2. He did not lose a single set in the entire tournament. The victory made Federer the first player in ATP history to win 10 same tournament titles on two different surfaces. It was his 103rd and final ATP title before announcing his retirement in 2022.
Guido Andreozzi 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.
Henri Laaksonen was the defending champion but chose not to defend his title.
Hugo Dellien was the defending champion but chose not to defend his title.
Adrian Ungur was the defending champion when the event was last held in 2014 but chose not to defend his title as he had retired from professional tennis.
Hugo Dellien was the defending champion but lost in the quarterfinals to Juan Manuel Cerúndolo.
Jaume Munar was the defending champion but lost in the semifinals to Juan Ignacio Londero.
Casper Ruud defeated the defending champion Diego Schwartzman in the final, 5–7, 6–2, 6–3 to win the singles title at the 2022 Argentina Open.
Sebastián Báez was the defending champion but chose not to defend his title.
Sebastián Báez defeated Frances Tiafoe in the final, 6–3, 6–2 to win the singles tennis title at the 2022 Estoril Open. It was his maiden ATP Tour title.
Hugo Dellien was the defending champion but chose not to defend his title.