Career
Horvath played on the Women's Tennis Association Tour from 1981 to 1989, winning six singles titles and reaching a career high rank of World Number. 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 coached by renowned Australian coach Harry Hopman and Nick Bollettieri. New Hampshire = tournament not held.
A = did not participate in the tournament.