| Singles | |
|---|---|
| 2023 Istanbul Challenger | |
| Champion |  Damir Džumhur |
| Runner-up |  Lukáš Klein |
| Score | 7–6(7–5), 6–3 |
Radu Albot was the defending champion [1] but chose not to defend his title.
Damir Džumhur won the title after defeating Lukáš Klein 7–6(7–5), 6–3 in the final.
Kwon Soon-woo (first round)
Jesper de Jong (semifinals) Lukáš Klein (final)
Dino Prižmić (quarterfinals)
Gauthier Onclin (first round)
Harold Mayot (second round) Damir Džumhur (champion) Norbert Gombos (first round)| Semifinals | Final | ||||||||||||
 Nick Hardt | 4 | 3 | |||||||||||
| 7 | Damir Džumhur | 6 | 6 | ||||||||||
| 7 | Damir Džumhur | 77 | 6 | ||||||||||
| 3 | Lukáš Klein | 65 | 3 | ||||||||||
| 3 | Lukáš Klein | 77 | 62 | 77 | |||||||||
| 2 | Jesper de Jong | 62 | 77 | 65 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | S-w Kwon | 0 | 1 | ||||||||||||||||||||||||
| N Hardt | 6 | 6 | N Hardt | 6 | 3 | 78 | |||||||||||||||||||||
 S Mansouri | 3 | 4 |  B Tomic | 2 | 6 | 66 | |||||||||||||||||||||
| B Tomic | 6 | 6 | N Hardt | 1 | 77 | 4 | |||||||||||||||||||||
 M Copil | 2 | 4 |  A Çelikbilek | 6 | 65 | 1r | |||||||||||||||||||||
| Q |  Y Oliel | 6 | 6 | Q | Y Oliel | 6 | 4 | 3 | |||||||||||||||||||
| A Çelikbilek | 6 | 6 | A Çelikbilek | 2 | 6 | 6 | |||||||||||||||||||||
| 5 | G Onclin | 1 | 0 | N Hardt | 4 | 3 | |||||||||||||||||||||
| 4 | D Prižmić | 6 | 63 | 7 | 7 | D Džumhur | 6 | 6 | |||||||||||||||||||
 L Wessels | 2 | 77 | 5 | 4 | D Prižmić | 4 | 6 | 6 | |||||||||||||||||||
| Q |  B Bicknell | 65 | 77 | 6 | Q | B Bicknell | 6 | 3 | 2 | ||||||||||||||||||
| M Martineau | 77 | 63 | 3 | 4 | D Prižmić | 3 | 77 | 5 | |||||||||||||||||||
| Y Erel | 6 | 1 | 7 | D Džumhur | 6 | 63 | 7 | ||||||||||||||||||||
| Q | D Cukierman | 2 | 0r | Y Erel | 5 | 3 | |||||||||||||||||||||
| WC | Tuncay Duran | 4 | 1 | 7 | D Džumhur | 7 | 6 | ||||||||||||||||||||
| 7 | D Džumhur | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | N Gombos | 6 | 1 | 2 | |||||||||||||||||||||||
 D Yevseyev | 4 | 6 | 6 | D Yevseyev | 6 | 77 | |||||||||||||||||||||
| Q |  L Borg | 1 | 6 | 3 | WC | K Kırcı | 2 | 64 | |||||||||||||||||||
| WC | K Kırcı | 6 | 3 | 6 | D Yevseyev | 65 | 77 | 62 | |||||||||||||||||||
 M Gengel | 1 | 2 | 3 | L Klein | 77 | 63 | 77 | ||||||||||||||||||||
| WC | E Kırkın | 6 | 6 | WC | E Kırkın | 3 | 4 | ||||||||||||||||||||
| Q |  M Damm | 4 | 6 | 5 | 3 | L Klein | 6 | 6 | |||||||||||||||||||
| 3 | L Klein | 6 | 4 | 7 | 3 | L Klein | 77 | 62 | 77 | ||||||||||||||||||
| 6 | H Mayot | 77 | 7 | 2 | J de Jong | 62 | 77 | 65 | |||||||||||||||||||
| A Dougaz | 64 | 5 | 6 | H Mayot | 77 | 3 | 3 | ||||||||||||||||||||
| C İlkel | 5 | 4 | G Mpetshi Perricard | 61 | 6 | 6 | |||||||||||||||||||||
| G Mpetshi Perricard | 7 | 6 | G Mpetshi Perricard | 5 | 4 | ||||||||||||||||||||||
 J Monday | 4 | 6 | 6 | 2 | J de Jong | 7 | 6 | ||||||||||||||||||||
 K Żuk | 6 | 1 | 4 | J Monday | 5 | 1 | |||||||||||||||||||||
| Q | M İlhan | 2 | 77 | 2 | 2 | J de Jong | 7 | 6 | |||||||||||||||||||
| 2 | J de Jong | 6 | 63 | 6 | |||||||||||||||||||||||
The 2014 BRD Năstase Țiriac Trophy - Singles was a session of the larger BRD Năstase Țiriac Trophy tennis tournament held at Arenele BNR in Bucharest, Romania, from 21 to 27 April 2014. Lukáš Rosol was the defending champion, but lost in the final to Grigor Dimitrov 7–6(7–2), 6–1
Richard Gasquet was the defending champion, but withdrew before the tournament began.
Marin Čilić won the title, defeating Roberto Bautista Agut in the final, 6–4, 6–4.
Damir Džumhur was the defending champion but lost in the second round.
It was the first edition of the tournament.
Daniel Muñoz de la Nava won the title, defeating Radu Albot in the final, 6–0, 6–1.
Andreas Siljeström and Igor Zelenay were the defending champions, but Siljeström played alongside Frank Moser and lost to Marcel Granollers and Pere Riba in the first round, while Zelenay teamed with Mateusz Kowalczyk and also lost in the first round to Julian Knowle and Philipp Oswald.
Lukáš Rosol was the defending champion, but lost to Jerzy Janowicz in the second round. Kevin Anderson won the title defeating in the final Pierre-Hugues Herbert with the score 6–4, 7–5.
Three-time defending champion Kei Nishikori successfully defended his title, defeating Taylor Fritz in the final, 6–4, 6–4 to win the singles title at the 2016 Memphis Open. Notably, this was only Fritz' third career event on the ATP Tour.
Andy Murray defeated Jo-Wilfried Tsonga in the final, 6–3, 7–6(8–6) to win the singles tennis title at the 2016 Vienna Open.
Defending champion Rafael Nadal defeated Albert Ramos Viñolas in the final, 6–1, 6–3 to win the singles tennis title at the 2017 Monte-Carlo Masters. It was his record-extending 10th Monte Carlo Masters title, becoming the first man in the Open Era to win 10 singles titles at the same tournament. Nadal also claimed his Open Era record 50th clay court title.
Alexander Zverev was the defending champion, but chose not to participate this year.
Tomáš Berdych was the two-time defending champion, but withdrew before the competition began.
Yūichi Sugita was the defending champion but lost in the second round to Pierre-Hugues Herbert.
Roberto Bautista Agut was the defending champion, but chose not to participate this year.
Alexander Zverev defeated Nicolás Jarry in the final, 6–3, 3–6, 7–6(10–8) to win the singles tennis title at the 2019 Geneva Open. Zverev saved two championship points en route to the title, in the final-set tiebreak.
First seed Alexander Zverev won the tournament, defeating second seed Diego Schwartzman 6–2, 6–1 in the final. This was the first edition of the tournament, primarily organised due to the cancellation of many tournaments in 2020, due to the COVID-19 pandemic.
Marc-Andrea Hüsler was the defending champion but lost in the semifinals to Thanasi Kokkinakis.
Andrey Rublev was the reigning champion from when the tournament was last held in 2019, but lost to Adrian Mannarino in the second round in a rematch of the 2019 final.
There was no defending champion as the final of the previous edition was canceled due to the coronavirus pandemic.
Dominic Stricker was the defending champion but lost in the first round to Jurij Rodionov.
Sebastian Ofner was the defending champion but chose not to defend his title.