|Country (sports)||United States|
|Residence||Short Hills, New Jersey, USA|
October 16, 1965 |
Chicago, Illinois, USA
|Turned pro||January 1981|
|Plays||Right-handed (two-handed backhand)|
|Highest ranking||No. 10 (June 11, 1984)|
|Grand Slam Singles results|
|Australian Open||1R (1989)|
|French Open||QF (1983, 1984)|
|US Open||3R (1981, 1986)|
|Highest ranking||No. 45 (September 12, 1988)|
Horvath was the youngest player to win the U.S. National 16 and under in 1979. She also is the only player to ever win all four age groups in the U.S. Girls Clay Courts in all consecutive years.
Horvath played on the WTA Tour from 1981 to 1989, winning six singles titles and reaching a career high rank of World No. 10 in 1984. She reached the quarterfinals at the French Open in 1983 and 1984. She retired with a 176–154 singles record.
Horvath was the only player to defeat Martina Navratilova in the 1983 season (at the 1983 French Open). She stunned Navratilova in the fourth round 6–4, 0–6, 6–3 while Navratilova's coaches (Renee Richards and Nancy Lieberman) argued in the stands over strategy, something Navratilova noticed during the match.
Horvath had career victories over Navratilova, Andrea Jaeger, Manuela Maleeva, Gabriela Sabatini, Dianne Fromholtz, Claudia Kohde-Kilsch, Mary Joe Fernández, Betty Stöve, and Sylvia Hanika. She was a member of the 1984 US Fed Cup Team. She was coached by renowned Australian coach Harry Hopman and Nick Bollettieri.
WTA Career finals
Singles 9: (6–3)
|Winner||1.||25 January 1981||Montreal||Carpet (I)||Candy Reynolds||6–4, 7–6|
|Winner||2.||6 March 1983||Nashville||Carpet (I)||Marcela Skuherská||6–4, 6–3|
|Runner-up||1.||23 May 1983||Berlin||Clay||Chris Evert-Lloyd||4–6, 6–7(1–7)|
|Winner||3.||13 November 1983||Honolulu||Carpet (I)||Carling Bassett||4–6, 6–2, 7–6(7–1)|
|Runner-up||2.||29 January 1984||Marco Island||Clay||Bonnie Gadusek||6–3, 0–6, 4–6|
|Runner-up||3.||20 May 1984||Berlin||Clay||Claudia Kohde-Kilsch||6–7(8–10), 1–6|
|Winner||4.||10 March 1985||Indianapolis||Carpet (I)||Elise Burgin||6–2, 6–4|
|Winner||5.||31 March 1985||Palm Beach Gardens||Clay||Petra Delhees-Jauch||3–6, 6–3, 6–3|
|Winner||6.||12 July 1987||Knokke||Clay||Bettina Bunge||6–1, 7–6(7–5)|
Doubles 9: (3–6)
|Winner||1.||9 May 1982||Perugia||Clay||Yvonne Vermaak|| Billie Jean King
|2–6, 6–4, 7–6|
|Winner||2.||7 August 1983||Indianapolis||Clay||Virginia Ruzici|| Gigi Fernández
|4–6, 7–6, 6–2|
|Runner-up||1.||20 May 1984||Berlin||Clay||Virginia Ruzici|| Anne Hobbs
|3–6, 6–4, 6–7(11–13)|
|Runner-up||2.||27 May 1984||Perugia||Clay||Virginia Ruzici|| Iva Budařová
|6–7(5–7), 6–1, 4–6|
|Winner||3.||10 March 1985||Indianapolis||Carpet (I)||Elise Burgin|| Jennifer Mundel
Molly Van Nostrand
|Runner-up||3.||28 April 1985||Orlando||Clay||Elise Burgin|| Martina Navratilova
|Runner-up||4.||24 May 1987||Strasbourg||Clay||Marcella Mesker|| Jana Novotná
|Runner-up||5.||12 July 1987||Knokke||Clay||Marcella Mesker|| Bettina Bunge
|6–4, 4–6, 4–6|
|Runner-up||6.||11 October 1987||Athens||Clay||Dinky Van Rensburg|| Andrea Betzner
Grand Slam singles performance timeline
|Australian Open||A||A||A||A||A||A||A||NH||A||A||1R||0 / 1|
|French Open||A||2R||3R||3R||QF||QF||3R||1R||1R||1R||A||0 / 9|
|Wimbledon||A||A||A||1R||A||2R||A||3R||1R||1R||A||0 / 5|
|US Open||2R||2R||3R||A||2R||1R||1R||3R||1R||A||A||0 / 8|
|SR||0 / 1||0 / 2||0 / 2||0 / 2||0 / 2||0 / 3||0 / 2||0 / 3||0 / 3||0 / 2||0 / 1||0 / 23|
|Year End Ranking||NR||NR||28||49||15||29||50||47||37||85||218|
- NH = tournament not held.
- A = did not participate in the tournament.
- SR = the ratio of the number of Grand Slam singles tournaments won to the number of those tournaments played.
- Kathleen Horvath at the Women's Tennis Association
- Kathleen Horvath at the International Tennis Federation
- Kathleen Horvath at the Fed Cup