| Men's singles | |
|---|---|
| 2018 Stockton Challenger | |
| Champion |  Lloyd Harris |
| Runner-up |  Marc Polmans |
| Final score | 6–2, 6–2 |
Cameron Norrie was the defending champion but chose not to defend his title.
Lloyd Harris won the title after defeating Marc Polmans 6–2, 6–2 in the final.
Jordan Thompson (Semifinals)
Reilly Opelka (First round)
Henri Laaksonen (First round) Lloyd Harris (Champion)
Casper Ruud (Second round) Noah Rubin (Quarterfinals) Alex Bolt (Second round) Marc Polmans (Final)| Semifinals | Final | ||||||||||||
| 1 | Jordan Thompson | 66 | 2 | ||||||||||
| 4 | Lloyd Harris | 78 | 6 | ||||||||||
| 4 | Lloyd Harris | 6 | 6 | ||||||||||
| 8 | Marc Polmans | 2 | 2 | ||||||||||
| 8 | Marc Polmans | 6 | 6 | ||||||||||
 Maxime Janvier | 1 | 4 | |||||||||||
| First Round | Second Round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | J Thompson | 6 | 6 | ||||||||||||||||||||||||
| Q | P Kypson | 2 | 2 | 1 | J Thompson | 4 | 6 | 6 | |||||||||||||||||||
| Alt |  K Uchida | 6 | 63 | 6 | Alt | K Uchida | 6 | 3 | 1 | ||||||||||||||||||
| Q | T Paul | 1 | 77 | 0 | 1 | J Thompson | 64 | 77 | 6 | ||||||||||||||||||
| Q | W Blumberg | 3 | 6 | 6 | 6 | N Rubin | 77 | 62 | 3 | ||||||||||||||||||
| JC Aragone | 6 | 2 | 2 | Q | W Blumberg | 1 | 6 | 4 | |||||||||||||||||||
| WC | J Brooksby | 2 | 4 | 6 | N Rubin | 6 | 4 | 6 | |||||||||||||||||||
| 6 | N Rubin | 6 | 6 | 1 | J Thompson | 66 | 2 | ||||||||||||||||||||
| 4 | L Harris | 6 | 6 | 4 | L Harris | 78 | 6 | ||||||||||||||||||||
 D Köpfer | 3 | 4 | 4 | L Harris | 6 | 6 | |||||||||||||||||||||
| WC | T-S Kwiatkowski | 3 | 77 | 6 | WC | T-S Kwiatkowski | 2 | 4 | |||||||||||||||||||
 L Miedler | 6 | 65 | 4 | 4 | L Harris | 66 | 6 | 6 | |||||||||||||||||||
| C Eubanks | 6 | 77 | C Eubanks | 78 | 4 | 3 | |||||||||||||||||||||
 C İlkel | 4 | 64 | C Eubanks | 6 | 710 | ||||||||||||||||||||||
| J Choinski | 3 | 0 | 5 | C Ruud | 1 | 68 | |||||||||||||||||||||
| 5 | C Ruud | 6 | 6 | ||||||||||||||||||||||||
| First Round | Second Round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | M Polmans | 6 | 6 | ||||||||||||||||||||||||
 J Clarke | 3 | 0 | 8 | M Polmans | 64 | 6 | 6 | ||||||||||||||||||||
| M Krueger | 3 | 6 | 6 | M Krueger | 77 | 4 | 3 | ||||||||||||||||||||
| J-P Smith | 6 | 3 | 4 | 8 | M Polmans | 4 | 6 | 6 | |||||||||||||||||||
| D Evans | 6 | 6 | L Broady | 6 | 4 | 2 | |||||||||||||||||||||
| SE | J Duckworth | 2 | 2 | D Evans | 0 | 77 | 4 | ||||||||||||||||||||
| L Broady | 3 | 6 | 6 | L Broady | 6 | 63 | 6 | ||||||||||||||||||||
| 3 | H Laaksonen | 6 | 4 | 4 | 8 | M Polmans | 6 | 6 | |||||||||||||||||||
| 7 | A Bolt | 6 | 6 | M Janvier | 1 | 4 | |||||||||||||||||||||
| WC | T Fawcett | 4 | 1 | 7 | A Bolt | 4 | 3 | ||||||||||||||||||||
 D King | 6 | 6 | D King | 6 | 6 | ||||||||||||||||||||||
| WC |  Philip Hjorth | 1 | 1 | D King | 5 | 7 | 63 | ||||||||||||||||||||
| Q | A Sarkissian | 6 | 64 | 6 | M Janvier | 7 | 5 | 77 | |||||||||||||||||||
| M Banes | 4 | 77 | 1 | Q | A Sarkissian | 61 | 0 | ||||||||||||||||||||
| M Janvier | 64 | 6 | 6 | M Janvier | 77 | 6 | |||||||||||||||||||||
| 2 | R Opelka | 77 | 4 | 4 | |||||||||||||||||||||||
Lucas Miedler and Bradley Mousley were the defending champions but were no longer eligible to compete in juniors in 2015.
Benjamin Mitchell was the defending champion but chose not to defend his title.
Gaël Monfils was the defending champion, but lost in the second round to Yuki Bhambri.
Michael Mmoh was the defending champion but chose not to defend his title.
Alex Bolt and Max Purcell were the defending champions but only Purcell chose to defend his title, partnering Lloyd Harris. Purcell lost in the semifinals to Joris De Loore and Marc Polmans.
Stéphane Robert was the defending champion but lost in the quarterfinals to Maverick Banes.
Marc Polmans was the defending champion but lost in the second round to Tristan Lamasine.
Alexander Zverev was the two-time defending champion but chose not to defend his title.
The 2019 OEC Kaohsiung-Singles was a men's tennis tournament held from September 16 to September 22, 2019 at Kaohsiung, Taiwan. Gaël Monfils was the defending champion but chose not to defend his title.
Thomas Fabbiano was the defending champion but chose not to defend his title.
Jordan Thompson was the defending champion but chose not to defend his title.
Rogério Dutra Silva was the defending champion but chose not to defend his title.
Rajeev Ram and Joe Salisbury won the men's doubles tennis title at the 2020 Australian Open, defeating wildcards Max Purcell and Luke Saville in the final, 6–4, 6–2.
Barbora Krejčíková and Rajeev Ram were the defending champions, but Ram chose not to participate. Krejčíková played alongside Nikola Mektić, and successfully defended the title, defeating Bethanie Mattek-Sands and Jamie Murray in the final 5–7, 6–4, [10–1].
Lloyd Harris was the defending champion but chose not to defend his title.
First seed Alexander Zverev won the tournament, defeating third seed Félix Auger-Aliassime 6–3, 6–3 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.
Ivan Dodig and Filip Polášek defeated defending champions Rajeev Ram and Joe Salisbury in the final, 6–3, 6–4, to win the men's doubles tennis title at the 2021 Australian Open. By winning the title, Dodig and Polášek won their first Grand Slam doubles title as a team. The victory also earned Polášek his first major title and made him the second Slovak player to win one after compatriot Daniela Hantuchová.
Aslan Karatsev won his first ATP Tour singles title, defeating Lloyd Harris in the final, 6–3, 6–2 to win the men's singles tennis title at the 2021 Dubai Tennis Championships. Karatsev became the second wildcard in the tournament's history to win the men's singles title. Harris was the first qualifier to reach the final of the Dubai Tennis Championships.
John Millman was the defending champion, but lost in the quarterfinals to James Duckworth.
Marc Polmans was the defending champion but chose not to defend his title.