Karel Nováček (born 30 March 1965) is a retired Czech former top ten tennis player born in Prostějov, Czechoslovakia (Czech Republic).

[1] His best performance at a Grand Slam came at the 1994 US Open where he defeated Alexander Vladimirovich Volkov, Andriy Medvedev, Todd Woodbridge, Javier Frana and Jaime Yzaga before losing to Michael Stich in the semifinal.

In 1997, Novacek was suspended for three months for failing a drug test at the 1995 French Open; he forfeited $185,765, but denied taking cocaine knowingly.

[2] Nováček lived in Boca Raton, Florida, United States for 20 years, and then moved back to Czech Republic.

[3] In 2002, the Boca Raton News reported that their ten-year-old daughter Anika was a promising tennis player, winning several tournaments.