| Boys' singles | |
|---|---|
| 2009 US Open | |
| Champion |  Bernard Tomic |
| Runner-up |  Chase Buchanan |
| Score | 6–1, 6–3 |
Grigor Dimitrov was the defending champion, but did not compete in the Juniors this year.
Bernard Tomic won in the final 6–1, 6–3 against Chase Buchanan.
Yuki Bhambri (quarterfinals)
Daniel Berta (first round) Bernard Tomic (champion)
Huang Liang-chi (first round)
Agustín Velotti (first round)
Lim Young-kyu (second round) Andrea Collarini (third round)
Gianni Mina (semifinals)
Shuichi Sekiguchi (first round) Facundo Argüello (first round)
Kevin Krawietz (first round) Julien Obry (second round)
Julen Urigüen (first round)
David Souto (first round) Dominik Schulz (second round) Denis Kudla (quarterfinals)| Quarterfinals | Semifinals | Final | ||||||||||||||||||
| 1 | Yuki Bhambri | 3 | 64 | |||||||||||||||||
| WC | Chase Buchanan | 6 | 7 | |||||||||||||||||
| WC | Chase Buchanan | 6 | 6 | |||||||||||||||||
| 8 | Gianni Mina | 3 | 3 | |||||||||||||||||
| 16 | Denis Kudla | 6 | 6 | 3 | ||||||||||||||||
| 8 | Gianni Mina | 2 | 7 | 6 | ||||||||||||||||
| WC | Chase Buchanan | 1 | 3 | |||||||||||||||||
| 3 | Bernard Tomic | 6 | 6 | |||||||||||||||||
 Tiago Fernandes | 1 | 4 | ||||||||||||||||||
| 3 | Bernard Tomic | 6 | 6 | |||||||||||||||||
| 3 | Bernard Tomic | 6 | 7 | |||||||||||||||||
| Pierre-Hugues Herbert | 1 | 65 | ||||||||||||||||||
| Pierre-Hugues Herbert | 6 | 4 | 6 | |||||||||||||||||
| WC | Raymond Sarmiento | 2 | 6 | 2 | ||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 1 | Yuki Bhambri | 6 | 6 | ||||||||||||||||||||||||
| Jordan Cox | 2 | 1 | 1 | Y Bhambri | 6 | 6 | |||||||||||||||||||||
| Patrik Brydolf | 2 | 4 |  S Ehrat | 0 | 1 | ||||||||||||||||||||||
| Sandro Ehrat | 6 | 6 | 1 | Y Bhambri | 6 | 6 | |||||||||||||||||||||
| WC | Johannes Robert Van Overbeek | 4 | 3 | WC | J Sock | 4 | 3 | ||||||||||||||||||||
 Stanislav Poplavskyy | 6 | 6 | S Poplavskyy | 1 | 4 | ||||||||||||||||||||||
| WC | Jack Sock | 4 | 6 | 6 | WC | J Sock | 6 | 6 | |||||||||||||||||||
| 14 | David Souto | 6 | 1 | 4 | 1 | Y Bhambri | 3 | 64 | |||||||||||||||||||
| 11 | Kevin Krawietz | 6 | 1 | 5 | WC | C Buchanan | 6 | 7 | |||||||||||||||||||
| WC | Chase Buchanan | 3 | 6 | 7 | WC | C Buchanan | 6 | 6 | |||||||||||||||||||
| Hiroyasu Ehara | 7 | 6 | H Ehara | 4 | 4 | ||||||||||||||||||||||
| Adrien Puget | 5 | 1 | WC | C Buchanan | 6 | 6 | |||||||||||||||||||||
| Guilherme Clezar | 3 | 4 |  M Fucsovics | 2 | 3 | ||||||||||||||||||||||
| Márton Fucsovics | 6 | 6 | M Fucsovics | 6 | 6 | ||||||||||||||||||||||
| Evan King | 7 | 6 | E King | 2 | 3 | ||||||||||||||||||||||
| 5 | Agustín Velotti | 64 | 4 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 4 | Huang Liang-chi | 64 | 64 | ||||||||||||||||||||||||
| SE | Matthew Kandath | 7 | 7 | SE | M Kandath | 3 | 6 | 4 | |||||||||||||||||||
 Nikala Scholtz | 67 | 6 | 4 |  A De Greef | 6 | 4 | 6 | ||||||||||||||||||||
| Arthur De Greef | 7 | 4 | 6 | A De Greef | 6 | 3 | 4 | ||||||||||||||||||||
| Q |  Mikhail Biryukov | 1 | 6 | 6 | 16 | D Kudla | 4 | 6 | 6 | ||||||||||||||||||
| Richard Becker | 6 | 3 | 3 | Q | M Biryukov | 5 | 3 | ||||||||||||||||||||
 Radim Urbánek | 3 | 5 | 16 | D Kudla | 7 | 6 | |||||||||||||||||||||
| 16 | Denis Kudla | 6 | 7 | 16 | D Kudla | 6 | 6 | 3 | |||||||||||||||||||
| 10 | Facundo Argüello | 3 | 6 | 2 | 8 | G Mina | 2 | 7 | 6 | ||||||||||||||||||
| Q | Christian Lindell | 6 | 3 | 6 | Q | C Lindell | 4 | 6 | 6 | ||||||||||||||||||
| WC | Shane Vinsant | 1 | 1 | Q | S-y Jeong | 6 | 3 | 2 | |||||||||||||||||||
| Q | Jeong Suk-young | 6 | 6 | Q | C Lindell | 66 | 4 | ||||||||||||||||||||
 Jozef Kovalík | 6 | 7 | 8 | G Mina | 7 | 6 | |||||||||||||||||||||
| Harry Fowler | 4 | 65 | J Kovalík | 7 | 2 | 4 | |||||||||||||||||||||
| Q | Yasutaka Uchiyama | 4 | 4 | 8 | G Mina | 5 | 6 | 6 | |||||||||||||||||||
| 8 | Gianni Mina | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 7 | Andrea Collarini | 6 | 6 | ||||||||||||||||||||||||
| WC | Gonzales Austin | 1 | 3 | 7 | A Collarini | 6 | 6 | ||||||||||||||||||||
| Mitchell Frank | 6 | 5 | 1 |  F Gaio | 4 | 3 | |||||||||||||||||||||
| Federico Gaio | 2 | 7 | 6 | 7 | A Collarini | 4 | 5 | ||||||||||||||||||||
| WC | Dennis Novikov | 2 | 1 | T Fernandes | 6 | 7 | |||||||||||||||||||||
| Tiago Fernandes | 6 | 6 | T Fernandes | 2 | 6 | 6 | |||||||||||||||||||||
 Duilio Beretta | 66 | 3 | 12 | J Obry | 6 | 4 | 3 | ||||||||||||||||||||
| 12 | Julien Obry | 7 | 6 | T Fernandes | 1 | 4 | |||||||||||||||||||||
| 15 | Dominik Schulz | 6 | 6 | 3 | B Tomic | 6 | 6 | ||||||||||||||||||||
 Francis Casey Alcantara | 3 | 4 | 15 | D Schulz | 4 | 6 | 3 | ||||||||||||||||||||
| Q | Tobias Blomgren | 6 | 6 | Q | T Blomgren | 6 | 3 | 6 | |||||||||||||||||||
| WC | Bjorn Fratangelo | 4 | 4 | Q | T Blomgren | 6 | 1 | 2 | |||||||||||||||||||
| Alexander Domijan | 6 | 3 | 7 | 3 | B Tomic | 4 | 6 | 6 | |||||||||||||||||||
| Q | Sudanwa Sitaram | 3 | 6 | 5 | A Domijan | 6 | 5 | 1 | |||||||||||||||||||
 Henri Laaksonen | 4 | 3 | 3 | B Tomic | 4 | 7 | 6 | ||||||||||||||||||||
| 3 | Bernard Tomic | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 6 | Lim Yong-kyu | 6 | 6 | ||||||||||||||||||||||||
| Q |  Maximilian Neuchrist | 2 | 4 | 6 | Y-k Lim | 6 | 3 | 65 | |||||||||||||||||||
| José Pereira | 2 | 6 | 6 | J Pereira | 2 | 6 | 7 | ||||||||||||||||||||
| Junior Ore | 6 | 4 | 1 | J Pereira | 7 | 61 | 4 | ||||||||||||||||||||
 Alexandros Georgoudas | 6 | 3 | 6 | P-H Herbert | 5 | 7 | 6 | ||||||||||||||||||||
| Q | Sekou Bangoura | 4 | 6 | 0 | A Georgoudas | 2 | 4 | ||||||||||||||||||||
| Pierre-Hugues Herbert | 3 | 6 | 6 | P-H Herbert | 6 | 6 | |||||||||||||||||||||
| 9 | Shuichi Sekiguchi | 6 | 3 | 2 | P-H Herbert | 6 | 4 | 6 | |||||||||||||||||||
| 13 | Julen Urigüen | 3 | 3 | WC | R Sarmiento | 2 | 6 | 2 | |||||||||||||||||||
| Filip Horanský | 6 | 6 | F Horanský | 62 | 1 | ||||||||||||||||||||||
| WC | Raymond Sarmiento | 7 | 6 | WC | R Sarmiento | 7 | 6 | ||||||||||||||||||||
| Hsieh Cheng-peng | 5 | 3 | WC | R Sarmiento | 7 | 2 | 6 | ||||||||||||||||||||
| Renzo Olivo | 5 | 1 |  S Lavie | 6 | 6 | 1 | |||||||||||||||||||||
| Sebastian Lavie | 7 | 6 | S Lavie | 7 | 7 | ||||||||||||||||||||||
| Tennys Sandgren | 4 | 6 | 7 | T Sandgren | 64 | 65 | |||||||||||||||||||||
| 2 | Daniel Berta | 6 | 3 | 65 | |||||||||||||||||||||||
Bernard Tomic won in the final 4–6, 7–6(7–5), 6–0, against Yang Tsung-hua and claimed the title, becoming the youngest player to win a grand slam title.
Daniel Alejandro López and Matteo Trevisan were the defending champions but did not compete in the Juniors this year.
Ričardas Berankis was the defending champion but, no longer competing in junior tennis, did not defend his title.
Juan Martín del Potro was the defending champion, but chose to compete in Dubai instead.
Kevin Anderson won the title after defeating Marinko Matosevic 6–4, 7–6(7–2) in the final.
Nikolay Davydenko was the defending champion, but lost in the first round to Robert Farah.
Philipp Kohlschreiber won the title defeating Marin Čilić 7–6(10–8), 6–3 in the final.
Jarkko Nieminen was the defending champion, but lost to eventual champion Bernard Tomic in the quarterfinals.
It was Tomic's first ATP title and his first final; he defeated Kevin Anderson 6–3, 6–7(2–7), 6–3 in the final.
Novak Djokovic defeated the defending champion David Ferrer in the final, 7–5, 7–5, to win the singles title at the 2013 Paris Masters. It was his second Paris Masters title. It was also Ferrer's seventh consecutive defeat at an ATP World Tour's final.
Bernard Tomic was the last edition champion, and he successfully defended his title by defeating Adrian Mannarino in the final, 6–1, 3–6, 6–2.
Tomáš Berdych was the defending champion and successfully defended his title, defeating Jack Sock in the final, 7–6(7–1), 6–2.
Viktor Troicki was the defending champion and successfully defended his title, defeating Grigor Dimitrov in the final, 2–6, 6–1, 7–6(9–7).
Víctor Estrella Burgos was the defending champion and successfully defended his title, defeating Thomaz Bellucci in the final, 4–6, 7–6(7–5), 6–2.
David Ferrer was the defending champion, but lost to Alexandr Dolgopolov in the second round.
Nicolas Mahut was the defending champion and successfully defended his title, defeating Gilles Müller in the final, 6–4, 6–4.
Tomáš Berdych was the defending champion and successfully defended his title, defeating Richard Gasquet in the final, 7−6(7−5), 6−7(2−7), 6−3.
John Isner was the defending champion, but withdrew before the tournament began.
John Isner was the defending champion and successfully defended his title, defeating Ryan Harrison in a rematch of the 2017 final, 5–7, 6–3, 6–4.
Peter Gojowczyk was the defending champion, but lost to Kei Nishikori in the second round.
Denis Istomin was the defending champion, but chose not to participate this year.
Defending champion Rafael Nadal defeated Daniil Medvedev in the final, 6–3, 6–0 to win the men's singles tennis title at the 2019 Canadian Open. It was the first time Nadal successfully defended a hard court title.
Bernard Tomic was the defending champion, but retired in the first round of the qualifying tournament against Denis Istomin.