Players ATPWTA
| Name | Country |
|---|---|
| Oleg Khotkov | UKR |
| Stepan Khotulev | RUS |
| Basil Khuma | IND |
| Nawakarn Khunjan | THA |
| Yuya Kibi | JPN |
| Nicolas Kicker | ARG |
| Joel Kielbowicz | USA |
| Aziz Kijametovic | BIH |
| Gengo Kikuchi | JPN |
| Majed Kilani | TUN |
| Floris Kilian | NED |
| Kert Kilumets | EST |
| Cheong-Eui Kim | KOR |
| Duk-Young Kim | KOR |
| Dylan Seong Kwan Kim | KOR |
| Hyeong Don Kim | KOR |
| Hyun-Joon Kim | KOR |
| Jae Hwan Kim | KOR |
| Ji-Ha Kim | KOR |
| Sang-yuop Kim | KOR |
| Woo-Ram Kim | KOR |
| Young Seok Kim | KOR |
| Young-Jun Kim | KOR |
| Sun-Yong Kim Jr. | KOR |
| Joel Kincaid | USA |
| Darian King | BAR |
| Evan King | USA |
| Kevin King | USA |
| Leonardo Kirche | BRA |
| Strong Kirchheimer | USA |
| Ergi Kirkin | TUR |
| William Kirkman | DOM |
| Konosuke Kiryu | JPN |
| Ryota Kishi | JPN |
| Timur Kiuamov | RUS |
| Jesse Kiuru | FIN |
| Sizya Ernest Kivanda | GBR |
| Kirill Kivattsev | RUS |
| Timi Kivijarvi | FIN |
| Bradley Klahn | USA |
| Friedrich Klasen | GER |
| Ivo Klec | SVK |
| Alexis Klegou | BEN |
| Brydan Klein | GBR |
| Lukas Klein | SVK |
| Matheson Klein | AUS |
| Miroslav Kleman | SVK |
| Alexander Klintcharov | NZL |
| Martin Klizan | SVK |
| Denys Klok | UKR |