Players ATPWTA
| Name | Country |
|---|---|
| Patrick Kypson | USA |
| Sergis Kyratzis | CYP |
| Nick Kyrgios | AUS |
| Henri Laaksonen | SUI |
| Eduardo Lacalle | CHI |
| Felipe Lacalle | CHI |
| Lukas Lacko | SVK |
| Alexandre Lacroix | FRA |
| Tommaso Lago | ITA |
| Vicente Lagos | CHI |
| Dusan Lajovic | SRB |
| Florian Lakat | FRA |
| Igor Lakhno | UKR |
| Siu-Fai Kelvin Lam | HKG |
| Gonzalo Lama | CHI |
| Tristan Lamasine | FRA |
| Edoardo Lamberti | ITA |
| John Lamble | USA |
| Eduardo Lameiras | POR |
| Michael Lammer | SUI |
| Nathaniel Lammons | USA |
| Martin Landaluce | ESP |
| Philip Lang | AUT |
| Robin Lang | GER |
| Jeremy Langer | CAN |
| Nils Langer | GER |
| Ristomatti Lanne | FIN |
| Giovanni Lapentti | ECU |
| Augusto Laranja | BRA |
| Clement Larriere | FRA |
| Michael Laser | USA |
| Brandon Laubser | RSA |
| Yanais Laurent | FRA |
| Gonzalo Lavaselli | ARG |
| Sebastian Lavie | NZL |
| Alexandar Lazarov | BUL |
| Arturs Lazdins | LAT |
| Alexandar Lazov | BUL |
| Thomas Le Boulch | FRA |
| Teodor Leahu | ROU |
| Ricardo Alberto Leal Fuenmayor | VEN |
| Ilya Lebedev | RUS |
| Alexander Lebedyn | UKR |
| Mikhail Ledovskikh | RUS |
| Antoine Leduc | CAN |
| Dae-Hee Lee | KOR |
| Dong-Kyu Lee | KOR |
| Duckhee Lee | KOR |
| Hyun-Ho Lee | KOR |
| Jea Moon Lee | KOR |