| Men's singles | |
|---|---|
| 2018 Kentucky Bank Tennis Championships | |
| Champion |  Lloyd Harris |
| Runner-up |  Stefano Napolitano |
| Score | 6–4, 6–3 |
Michael Mmoh was the defending champion but chose not to defend his title.
Lloyd Harris won the title after defeating Stefano Napolitano 6–4, 6–3 in the final.
Marcel Granollers (withdrew)
Marc Polmans (second round)
Norbert Gombos (first round)
Liam Broady (first round) Max Purcell (first round) Lloyd Harris (champion) Jay Clarke (quarterfinals, retired) Stefano Napolitano (final)| Semifinals | Final | ||||||||||||
 Chung Yun-seong | 5 | 3 | |||||||||||
| 8 | Stefano Napolitano | 7 | 6 | ||||||||||
| 8 | Stefano Napolitano | 4 | 3 | ||||||||||
| 6 | Lloyd Harris | 6 | 6 | ||||||||||
| 6 | Lloyd Harris | 6 | 6 | ||||||||||
 Joris De Loore | 1 | 3 | |||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| Q |  J. J. Wolf | 6 | 77 | ||||||||||||||||||||||||
| D Evans | 0 | 65 | Q | J. J. Wolf | 3 | 711 | 5 | ||||||||||||||||||||
| Y-s Chung | 6 | 6 | Y-s Chung | 6 | 69 | 7 | |||||||||||||||||||||
| WC | W Bushamuka | 2 | 3 | Y-s Chung | 6 | 3 | |||||||||||||||||||||
| Q |  M Torpegaard | 60 | 64 | 7 | J Clarke | 3 | 0r | ||||||||||||||||||||
| Alt | A Harris | 77 | 77 | Alt | A Harris | 3 | 3 | ||||||||||||||||||||
 E Leshem | 4 | 4 | 7 | J Clarke | 6 | 6 | |||||||||||||||||||||
| 7 | J Clarke | 6 | 6 | Y-s Chung | 5 | 3 | |||||||||||||||||||||
| 4 | L Broady | 4 | 64 | 8 | S Napolitano | 7 | 6 | ||||||||||||||||||||
| Q |  B Gojo | 6 | 77 | Q | B Gojo | 7 | 4 | 78 | |||||||||||||||||||
| WC |  Tom Jomby | 6 | 77 | WC | T Jomby | 5 | 6 | 66 | |||||||||||||||||||
 L Catarina | 2 | 65 | Q | B Gojo | 4 | 4 | |||||||||||||||||||||
| A Ward | 6 | 6 | 8 | S Napolitano | 6 | 6 | |||||||||||||||||||||
| WC | S Riffice | 3 | 1 | A Ward | 3 | 6 | 3 | ||||||||||||||||||||
| Q | A Rybakov | 4 | 3 | 8 | S Napolitano | 6 | 2 | 6 | |||||||||||||||||||
| 8 | S Napolitano | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | L Harris | 6 | 6 | ||||||||||||||||||||||||
 Y Uchiyama | 4 | 4 | 6 | L Harris | 6 | 6 | |||||||||||||||||||||
| K Uchida | 6 | 6 | K Uchida | 4 | 4 | ||||||||||||||||||||||
| Alt | D Kelly | 2 | 4 | 6 | L Harris | 6 | 6 | ||||||||||||||||||||
| LL | R Schneider | 6 | 6 | LL | R Schneider | 3 | 2 | ||||||||||||||||||||
 I Sijsling | 2 | 4 | LL | R Schneider | 5 | ||||||||||||||||||||||
 S Myneni | 7 | 77 | S Myneni | 4r | |||||||||||||||||||||||
| 3 | N Gombos | 5 | 65 | 6 | L Harris | 6 | 6 | ||||||||||||||||||||
| 5 | M Purcell | 1 | 4 | J De Loore | 1 | 3 | |||||||||||||||||||||
 J Menezes | 6 | 6 | J Menezes | 3 | 4 | ||||||||||||||||||||||
| H Grenier | 77 | 62 | 4 | WC | C Altamirano | 6 | 6 | ||||||||||||||||||||
| WC | C Altamirano | 64 | 77 | 6 | WC | C Altamirano | 6 | 3 | 2r | ||||||||||||||||||
| J De Loore | 1 | 77 | 6 | J De Loore | 3 | 6 | 3 | ||||||||||||||||||||
 MT Barrios Vera | 6 | 64 | 4 | J De Loore | 1 | 6 | 6 | ||||||||||||||||||||
| A Bega | 4 | 0 | 2 | M Polmans | 6 | 3 | 4 | ||||||||||||||||||||
| 2 | M Polmans | 6 | 6 | ||||||||||||||||||||||||
Jiří Veselý was the defending champion, but he was ineligible to compete this year. World number one, Luke Saville of Australia led the field. The Aussie junior tennis player headed up the top ten seeds which included Thiago Monteiro, 2011 Wimbledon junior finalist Liam Broady, Kaichi Uchida, Frederico Ferreira Silva, Andrew Harris, Kyle Edmund, Stefano Napolitano, Nikola Milojević and Adam Pavlásek.
Bjorn Fratangelo was the defending champion, but was not eligible to participate.
Kimmer Coppejans won this event, defeating 5th-seed Filip Peliwo 6–1, 6–4 in the final.
Filip Peliwo defeated the defending champion Luke Saville in the final, 7–5, 6–4 to win the boys' singles tennis title at the 2012 Wimbledon Championships.
George Morgan and Mate Pavić were the defending champions but were no longer eligible to compete as Juniors.
Andrew Harris and Nick Kyrgios were the defending champions, but Harris was no longer eligible to compete in junior tennis, and thus could not defend his title.
Ričardas Berankis was the defending champion but chose not to defend his title.
Adrian Mannarino was the defending champion and successfully defended his title, defeating Nikola Milojević 6–3, 7–5 in the final.
Fabio Fognini was the defending champion, but lost in the quarterfinals to Andrey Rublev.
Feliciano López was the defending champion, but lost in the second round to Yannick Hanfmann.
Juan Martín del Potro was the defending champion and successfully defended his title, defeating Grigor Dimitrov in the final, 6–4, 6–2.
Jerzy Janowicz was the defending champion but chose not to defend his title.
Filip Krajinović was the defending champion but chose not to defend his title.
Jason Kubler was the defending champion but chose not to defend his title.
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.
Arthur De Greef was the defending champion but lost in the third round to Tomáš Macháč.
Matteo Berrettini was the defending champion, but withdrew with an ankle injury before the tournament began.
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.
Stefanos Tsitsipas was the defending champion and successfully defended his title, defeating Félix Auger-Aliassime in the final, 6–3, 6–4.
Roger Federer was the defending champion, but withdrew from the tournament after undergoing surgery on his right knee.