| Singles | |
|---|---|
| 2019 Hungarian Challenger Open | |
| Champion |  Alexander Bublik | 
| Runner-up |  Roberto Marcora | 
| Final score | 6–0, 6–3 | 
Vasek Pospisil was the defending champion but chose not to defend his title.
Alexander Bublik won the title after defeating Roberto Marcora 6–0, 6–3 in the final.
All seeds receive a bye into the second round.
 Ramkumar Ramanathan (second round)
  Ramkumar Ramanathan (second round) Lukáš Rosol (second round)
  Lukáš Rosol (second round) Jürgen Zopp (second round)
  Jürgen Zopp (second round) Dennis Novak (second round, retired)
  Dennis Novak (second round, retired) Grégoire Barrère (second round)
  Grégoire Barrère (second round) Oscar Otte (semifinals)
  Oscar Otte (semifinals) Filippo Baldi (third round)
  Filippo Baldi (third round) Alexander Bublik (champion)
  Alexander Bublik (champion) Nikola Milojević (third round)
  Nikola Milojević (third round) Kimmer Coppejans (second round)
  Kimmer Coppejans (second round) Tallon Griekspoor (second round)
  Tallon Griekspoor (second round) Filip Horanský (semifinals)
  Filip Horanský (semifinals) Maxime Janvier (third round)
  Maxime Janvier (third round) Viktor Galović (quarterfinals)
  Viktor Galović (quarterfinals) Zdeněk Kolář (quarterfinals)
  Zdeněk Kolář (quarterfinals) Kevin Krawietz (second round)
  Kevin Krawietz (second round)| Quarterfinals | Semifinals | Final | ||||||||||||||||||
| 15 |  Zdeněk Kolář | 6 | 3 | 2 | ||||||||||||||||
|  Roberto Marcora | 2 | 6 | 6 | |||||||||||||||||
|  Roberto Marcora | 6 | 77 | ||||||||||||||||||
| 6 |  Oscar Otte | 4 | 63 | |||||||||||||||||
|  Mathias Bourgue | 3 | 3 | ||||||||||||||||||
| 6 |  Oscar Otte | 6 | 6 | |||||||||||||||||
|  Roberto Marcora | 0 | 3 | ||||||||||||||||||
| 8 |  Alexander Bublik | 6 | 6 | |||||||||||||||||
| 12 |  Filip Horanský | 6 | 78 | |||||||||||||||||
| WC |  Alex Molčan | 4 | 66 | |||||||||||||||||
| 12 |  Filip Horanský | 3 | 0 | |||||||||||||||||
| 8 |  Alexander Bublik | 6 | 6 | |||||||||||||||||
| 8 |  Alexander Bublik | 3 | 6 | 6 | ||||||||||||||||
| 14 |  Viktor Galović | 6 | 3 | 4 | ||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 1 |  R Ramanathan | 64 | 5 | ||||||||||||||||||||||||
|  U Ignatik | 6 | 7 |  U Ignatik | 77 | 7 | ||||||||||||||||||||||
| LL |  A Bega | 4 | 5 |  U Ignatik | 4 | 7 | 5 | ||||||||||||||||||||
| PR |  M Przysiężny | 2 | 4 | 15 |  Z Kolář | 6 | 5 | 7 | |||||||||||||||||||
| WC |  Z Piros | 6 | 6 | WC |  Z Piros | 77 | 1 | 2 | |||||||||||||||||||
| 15 |  Z Kolář | 62 | 6 | 6 | |||||||||||||||||||||||
| 15 |  Z Kolář | 6 | 3 | 2 | |||||||||||||||||||||||
|  R Marcora | 2 | 6 | 6 | ||||||||||||||||||||||||
| 11 |  T Griekspoor | 6 | 65 | 62 | |||||||||||||||||||||||
|  N Gombos | 79 | 6 |  N Gombos | 4 | 77 | 77 | |||||||||||||||||||||
| ITF |  A Karatsev | 67 | 2 |  N Gombos | 3 | 4 | |||||||||||||||||||||
|  R Marcora | 6 | 6 |  R Marcora | 6 | 6 | ||||||||||||||||||||||
| WC |  P Nagy | 2 | 1 |  R Marcora | 77 | 6 | |||||||||||||||||||||
| 5/SE |  G Barrère | 62 | 3 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 3 |  J Zopp | 3 | 1 | ||||||||||||||||||||||||
|  A Basso | 3 | 60 |  M Bourgue | 6 | 6 | ||||||||||||||||||||||
|  M Bourgue | 6 | 77 |  M Bourgue | 6 | 6 | ||||||||||||||||||||||
| ITF |  Baptiste Crepatte | 6 | 7 | ITF |  B Crepatte | 3 | 2 | ||||||||||||||||||||
|  TK Wang | 3 | 5 | ITF |  B Crepatte | 5 | 6 | 6 | ||||||||||||||||||||
| 16 |  K Krawietz | 7 | 4 | 3 | |||||||||||||||||||||||
|  M Bourgue | 3 | 3 | |||||||||||||||||||||||||
| 6 |  O Otte | 6 | 6 | ||||||||||||||||||||||||
| 9 |  N Milojević | 6 | 61 | 6 | |||||||||||||||||||||||
|  D Masur | 2 | 6 | 4 |  S Griekspoor | 4 | 77 | 4 | ||||||||||||||||||||
|  S Griekspoor | 6 | 3 | 6 | 9 |  N Milojević | 3 | 4 | ||||||||||||||||||||
| Q |  D Szintai | 3 | 4 | 6 |  O Otte | 6 | 6 | ||||||||||||||||||||
|  D Petrović | 6 | 6 |  D Petrović | 62 | 6 | 65 | |||||||||||||||||||||
| 6 |  O Otte | 77 | 3 | 77 | |||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 7 |  F Baldi | 4 | 6 | 6 | |||||||||||||||||||||||
| Alt |  H Grenier | 2 | 4 |  A Müller | 6 | 3 | 4 | ||||||||||||||||||||
|  A Müller | 6 | 6 | 7 |  F Baldi | 6 | 2 | 1 | ||||||||||||||||||||
|  L Miedler | 6 | 6 | 12 |  F Horanský | 3 | 6 | 6 | ||||||||||||||||||||
| WC |  G Borsos | 1 | 4 |  L Miedler | 2 | 64 | |||||||||||||||||||||
| 12 |  F Horanský | 6 | 77 | ||||||||||||||||||||||||
| 12 |  F Horanský | 6 | 78 | ||||||||||||||||||||||||
| WC |  A Molčan | 4 | 66 | ||||||||||||||||||||||||
| 13 |  M Janvier | 77 | 3 | 6 | |||||||||||||||||||||||
|  N Serdarušić | 2 | 2 |  V Durasovic | 60 | 6 | 3 | |||||||||||||||||||||
|  V Durasovic | 6 | 6 | 13 |  M Janvier | 2 | 4 | |||||||||||||||||||||
| WC |  A Molčan | 5 | 7 | 77 | WC |  A Molčan | 6 | 6 | |||||||||||||||||||
| ITF |  Peter Heller | 7 | 5 | 61 | WC |  A Molčan | 6 | 3 | |||||||||||||||||||
| 4 |  D Novak | 2 | 0r | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 8 |  A Bublik | 6 | 7 | ||||||||||||||||||||||||
| Q |  S Diez | 6 | 6 | Q |  S Diez | 1 | 5 | ||||||||||||||||||||
| ITF |  R Bonadio | 4 | 2 | 8 |  A Bublik | 65 | 6 | 6 | |||||||||||||||||||
|  P Kotov | 1 | 6 | 6 |  P Kotov | 77 | 2 | 2 | ||||||||||||||||||||
|  M Viola | 6 | 4 | 3 |  P Kotov | 6 | 2 | 6 | ||||||||||||||||||||
| 10 |  K Coppejans | 4 | 6 | 3 | |||||||||||||||||||||||
| 8 |  A Bublik | 3 | 6 | 6 | |||||||||||||||||||||||
| 14 |  V Galović | 6 | 3 | 4 | |||||||||||||||||||||||
| 14 |  V Galović | 77 | 6 | ||||||||||||||||||||||||
|  E Benchetrit | 5 | 0 | Alt |  S Doumbia | 65 | 2 | |||||||||||||||||||||
| Alt |  S Doumbia | 7 | 6 | 14 |  V Galović | 77 | 5 | 6 | |||||||||||||||||||
|  B Zapata Miralles | 6 | 6 |  B Zapata Miralles | 64 | 7 | 2 | |||||||||||||||||||||
|  M-A Hüsler | 1 | 3 |  B Zapata Miralles | 6 | 7 | ||||||||||||||||||||||
| 2 |  L Rosol | 3 | 5 | ||||||||||||||||||||||||
Philipp Kohlschreiber was the defending champion, but lost in the second round to Horacio Zeballos.
Evgeny Donskoy was the defending champion but lost in the quarterfinals to Egor Gerasimov.
Alexander Bublik was the defending champion but chose not to defend his title.
Jason Kubler was the defending champion but chose not to defend his title.
Maximilian Marterer was the defending champion but chose not to defend his title.
Matteo Berrettini was the defending champion but chose not to defend his title.
David Ferrer was the defending champion but chose not to defend his title.
Christopher Eubanks was the defending champion but lost in the second round to Liam Broady.
Rudolf Molleker was the defending champion but lost in the quarterfinals to Dennis Novak.
Marin Čilić was the defending champion, but lost in the second round to Diego Schwartzman.
Dominic Thiem was the defending champion, but he chose not to defend his title this year.
Defending champion Rafael Nadal successfully defended his title, defeating Daniil Medvedev in the final, 6–3, 6–0, to win the men's singles title at the 2019 Canadian Open. This was the first time Nadal defended a hardcourt title.
Bernard Tomic was the defending champion, but retired in the first round of the qualifying tournament against Denis Istomin.
Novak Djokovic was the defending champion, but lost to Stefanos Tsitsipas in the quarterfinals.
Kevin Anderson was the defending champion, but could not participate this year due to a knee injury.
Alexander Bublik was the defending champion but chose not to defend his title.
Alexander Bublik was the defending champion but chose not to defend his title.
Lorenzo Sonego was the defending champion but chose not to participate. Alex de Minaur won the title, having defeated in the final Alexander Bublik with the score 2-0 ret.
Albert Ramos Viñolas defeated Cameron Norrie in the final, 4–6, 6–3, 7–6(7–3) to win the singles tennis title at the 2021 Estoril Open. It marked his third career ATP Tour singles title, all of which have been on clay. Norrie was aiming to win his first ATP Tour title in his second final.
Alexander Bublik defeated Alexander Zverev in the final, 6–4, 6–3 to win the singles title at the 2022 Open Sud de France. It was his first ATP Tour title.