Website-Karte - K
- Katar - Niederlande
- Katar - Schweden
- Katar - Tadschikistan
- Katar - Tschechien
- Katar - Ukraine
- Katar - Ungarn
- Kate Jackson - Anastasia Yankova (Frauen)
- Kateřina Siniaková - Magda Linette
- Kateryna Bondarenko - Agnieszka Radwanska
- Katie Boulter - Magda Linette
- Katie Taylor - Anahi Sanchez
- Katie Taylor - Chantelle Cameron
- Katie Taylor - Christina Linardatou
- Kazushi Sakuraba - Shinya Aoki
- Keegan Vandermeer - Sawyer Depee
- Kei Nishikori - Alexandr Dolgopolov
- Kei Nishikori - Benoit Paire
- Kei Nishikori - Dominic Thiem
- Kei Nishikori - Grigor Dimitrov
- Kei Nishikori - Marin Cilic
- Kei Nishikori - Nick Kyrgios
- Kei Nishikori - Novak Djokovic
- Kei Nishikori - Rafael Nadal
- Kei Nishikori - Stan Wawrinka
- Keita Nakamura - Tom Breese
- Keith Richardson - Bekhzod Usmonov
- Keith Richardson - Michael Larrimore
- Kell Brook - Amir Khan
- Kell Brook - Gennady Golovkin
- Kell Brook - Terence Crawford
- Kelvin Gastelum - Chris Weidman
- Kelvin Gastelum - Jared Cannonier
- Kelvin Gastelum - Michael Bisping
- Kelvin Gastelum - Robert Whittaker
- Kelvin Gastelum - Ronaldo Souza
- Kelvin Gastelum - Vitor Belfort
- Kelvin Young - Leon McKenzie
- Kendo Castaneda - Jose Zepeda
- Kenia - Algerien
- Kenia - Argentinien (Frauen)