Tennis players 30 / 60
Justin Gimelstob (1977)
Justine Henin (1982)
Justine Ozga (1988)
K. J. Hippensteel (1980)
Kaes Van't Hof (1986)
Kaia Kanepi (1985)
Kamil Čapkovič (1986)
Kamilla Farhad (1996)
Karel Koželuh (1895)
Karel Nováček (1965)
Karen Castiblanco (1988)
Karen Krantzcke (1946)
Karen Paterson (1982)
Karim Alami (1973)
Karim Maamoun (1979)
Karin Knapp (1987)
Karin Kschwendt (1968)
Karina Goia (1992)
Karina Habšudová (1973)
Karl Behr (1885)
Karl Meiler (1949)
Kārlis Lejnieks (1988)
Karol Beck (1982)
Karol Kučera (1974)
Karolina Jovanović (1988)
Karolina Kosińska (1986)
Karolína Plíšková (1992)
Karolina Šprem (1984)
Karolina Wlodarczak (1987)
Karsten Braasch (1967)
Katalin Marosi (1979)
Katarína Kachlíková (1985)
Katarina Srebotnik (1981)
Katarzyna Piter (1991)
Kate Latham (1952)
Kateřina Kramperová (1988)
Katerina Maleeva (1969)
Kateryna Bondarenko (1986)
Kateryna Kozlova (1994)
Kathleen Horvath (1965)